CVE-2022-24682

CRITICALNVD 6.19.0
EchelonGraph scoreHIGH confidence

“▲” beside the score: it is higher than NVD's CVSS score.

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2022-02-25), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 6.1 retained for reference. The 9.0 is the floor for confirmed exploitation, not an impact rating: this CVE's impact severity (EG Severity) is CVSS 6.1 MEDIUM under GitHub Security Advisory CVSS. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: CISA Known Exploited Vulnerabilities catalog, EPSS, GitHub Security Advisory, NVD CVSS v3
Trending — 3 sources updated this weekExploited in the wild
9.0EG
EchelonGraph verdictMitigate nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV) — the reason this is sooner than the SSVC decision on this page at every mission impact level
CISA-KEV: ExploitedEPSS PROB: 31%CVSS: 6.1Exploit: No code on recordExposed services: Not assessed

No fix is confirmed yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for the fix.

The CVE record's description, written by its CNA (MITRE Corporation), states the affected versions: "An issue was discovered in the Calendar feature in Zimbra Collaboration Suite 8.8.x before 8.8.15 patch 30 (update 1), as exploited in the wild starting in December 2021." No release containing a fix is confirmed on record.

An issue was discovered in the Calendar feature in Zimbra Collaboration Suite 8.8.x before 8.8.15 patch 30 (update 1), as exploited in the wild starting in December 2021. An attacker could place HTML containing executable JavaScript inside element attributes. This markup becomes unescaped, causing arbitrary markup to be injected into the document.

CVSS v3
6.1
EG Score
9.0CRITICALhigh confidence
EG Risk
67
EG Risk 67/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity61% × 45%
Impact severity (EG Severity): CVSS 6.1 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation100% × 40%
Fixed at 100% for a CISA KEV listing: EchelonGraph's rule.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation active (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.
EPSS PROB
31%
EPSS %ILE
98th
KEV
⚠ Exploited

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (9.0): severity, escalated by confirmed exploitation. This CVE's 9.0 is the CISA KEV floor for confirmed exploitation, not an impact rating: its impact severity (EG Severity) is CVSS 6.1 MEDIUM.

EG Severity
6.1 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
31% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-22). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
CISA KEV and EG-KEV Tier 1 (exploited in the wild)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Attend at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; 14 days if it is not.Each input and its source: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.

Exploitation active (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; 14 days if it is not.

In CISA KEV yes (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

CISA required action“Apply updates per vendor instructions.”

Quoted verbatim from CISA's Known Exploited Vulnerabilities catalog. CISA directs it at US federal civilian executive branch agencies under Binding Operational Directive (BOD) 26-04, which replaced BOD 22-01 on 10 June 2026; it is not EchelonGraph's advice. CISA's notes: https://nvd.nist.gov/vuln/detail/CVE-2022-24682

Published

February 9, 2022

Last Modified

August 7, 2026

Advisory Details (5)

Auto-updated Oct 20, 2026
⚠️ Actively exploited (CISA KEV, CISA Vulnrichment). No fix on record yet.
Web pageMentions a patch (unverified)

Operation EmailThief: Active Exploitation of Zero-day XSS Vulnerability in Zimbra | Volexity

https://www.volexity.com/blog/2022/02/03/operation-emailthief-active-exploitation-of-zero-day-xss-vulnerability-in-zimbra/
Web page

Zimbra Security Advisories - Zimbra :: Tech Center

https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories
Web pageMentions a patch (unverified)

Zimbra Releases/8.8.15/P30 - Zimbra :: Tech Center

https://wiki.zimbra.com/wiki/Zimbra_Releases/8.8.15/P30
Web page

Security Center - Zimbra :: Tech Center

https://wiki.zimbra.com/wiki/Security_Center
Web page

Hotfix Available 5 Feb for Zero-day Exploit Vulnerability in Zimbra 8.8.15 - Zimbra : Blog

https://blog.zimbra.com/2022/02/hotfix-available-5-feb-for-zero-day-exploit-vulnerability-in-zimbra-8-8-15/

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 20× in last 7d / 188× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 100 of 1,121 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 1,021 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-23 16:28 UTCEPSS rescoreEPSS 31% · 98th percentile
  2. 2026-10-23 06:09 UTCEG score recompute
  3. 2026-10-23 06:08 UTCGHSA enrichmentGHSA-fh88-2p7h-7g9h · GitHub CVSS 6.1
  4. 2026-10-22 16:30 UTCEPSS rescoreEPSS 31% · 98th percentile
  5. 2026-10-22 06:11 UTCEG score recompute
  6. 2026-10-22 06:11 UTCGHSA enrichmentGHSA-fh88-2p7h-7g9h · GitHub CVSS 6.1
  7. 2026-10-21 16:28 UTCEPSS rescoreEPSS 31% · 98th percentile
  8. 2026-10-21 06:16 UTCEG score recompute
  9. 2026-10-21 06:16 UTCGHSA enrichmentGHSA-fh88-2p7h-7g9h · GitHub CVSS 6.1
  10. 2026-10-20 16:29 UTCEPSS rescoreEPSS 31% · 98th percentile
  11. 2026-10-20 06:21 UTCEG score recompute
  12. 2026-10-20 06:20 UTCGHSA enrichmentGHSA-fh88-2p7h-7g9h · GitHub CVSS 6.1
  13. 2026-10-19 16:28 UTCEPSS rescoreEPSS 31% · 98th percentile
  14. 2026-10-19 06:25 UTCEG score recompute
  15. 2026-10-19 06:25 UTCGHSA enrichmentGHSA-fh88-2p7h-7g9h · GitHub CVSS 6.1
  16. 2026-10-18 06:28 UTCEG score recompute
  17. 2026-10-18 06:28 UTCGHSA enrichmentGHSA-fh88-2p7h-7g9h · GitHub CVSS 6.1
  18. 2026-10-17 16:29 UTCEPSS rescoreEPSS 31% · 98th percentile
  19. 2026-10-17 06:33 UTCEG score recompute
  20. 2026-10-17 06:32 UTCGHSA enrichmentGHSA-fh88-2p7h-7g9h · GitHub CVSS 6.1
  21. 2026-10-16 16:34 UTCEPSS rescoreEPSS 31% · 98th percentile
  22. 2026-10-16 06:36 UTCEG score recompute
  23. 2026-10-16 06:36 UTCGHSA enrichmentGHSA-fh88-2p7h-7g9h · GitHub CVSS 6.1
  24. 2026-10-15 16:28 UTCEPSS rescoreEPSS 31% · 98th percentile
  25. 2026-10-15 06:39 UTCEG score recompute
Show 75 more
  1. 2026-10-15 06:39 UTCGHSA enrichmentGHSA-fh88-2p7h-7g9h · GitHub CVSS 6.1
  2. 2026-10-14 16:29 UTCEPSS rescoreEPSS 31% · 98th percentile
  3. 2026-10-14 06:42 UTCEG score recompute
  4. 2026-10-14 06:42 UTCGHSA enrichmentGHSA-fh88-2p7h-7g9h · GitHub CVSS 6.1
  5. 2026-10-13 16:29 UTCEPSS rescoreEPSS 31% · 98th percentile
  6. 2026-10-13 06:47 UTCGHSA enrichmentGHSA-fh88-2p7h-7g9h · GitHub CVSS 6.1
  7. 2026-10-12 18:58 UTCEG score recompute
  8. 2026-10-12 16:30 UTCEPSS rescoreEPSS 31% · 98th percentile
  9. 2026-10-12 06:51 UTCGHSA enrichmentGHSA-fh88-2p7h-7g9h · GitHub CVSS 6.1
  10. 2026-10-12 03:01 UTCGHSA enrichmentGHSA-fh88-2p7h-7g9h · GitHub CVSS 6.1
  11. 2026-10-11 23:10 UTCGHSA enrichmentGHSA-fh88-2p7h-7g9h · GitHub CVSS 6.1
  12. 2026-10-11 19:22 UTCEG score recompute
  13. 2026-10-11 19:21 UTCGHSA enrichmentGHSA-fh88-2p7h-7g9h · GitHub CVSS 6.1
  14. 2026-10-11 15:33 UTCEG score recompute
  15. 2026-10-11 15:33 UTCGHSA enrichmentGHSA-fh88-2p7h-7g9h · GitHub CVSS 6.1
  16. 2026-10-11 13:44 UTCEPSS rescoreEPSS 31% · 98th percentile
  17. 2026-10-11 11:44 UTCEG score recompute
  18. 2026-10-11 11:44 UTCGHSA enrichmentGHSA-fh88-2p7h-7g9h · GitHub CVSS 6.1
  19. 2026-10-11 07:56 UTCGHSA enrichmentGHSA-fh88-2p7h-7g9h · GitHub CVSS 6.1
  20. 2026-10-11 04:07 UTCGHSA enrichmentGHSA-fh88-2p7h-7g9h · GitHub CVSS 6.1
  21. 2026-10-11 00:18 UTCGHSA enrichmentGHSA-fh88-2p7h-7g9h · GitHub CVSS 6.1
  22. 2026-10-10 20:29 UTCEG score recompute
  23. 2026-10-10 20:29 UTCGHSA enrichmentGHSA-fh88-2p7h-7g9h · GitHub CVSS 6.1
  24. 2026-10-10 19:56 UTCEPSS rescoreEPSS 31% · 98th percentile
  25. 2026-10-10 16:39 UTCGHSA enrichmentGHSA-fh88-2p7h-7g9h · GitHub CVSS 6.1
  26. 2026-10-10 12:50 UTCGHSA enrichmentGHSA-fh88-2p7h-7g9h · GitHub CVSS 6.1
  27. 2026-10-10 09:01 UTCGHSA enrichmentGHSA-fh88-2p7h-7g9h · GitHub CVSS 6.1
  28. 2026-10-10 05:12 UTCGHSA enrichmentGHSA-fh88-2p7h-7g9h · GitHub CVSS 6.1
  29. 2026-10-10 01:23 UTCGHSA enrichmentGHSA-fh88-2p7h-7g9h · GitHub CVSS 6.1
  30. 2026-10-09 21:35 UTCEG score recompute
  31. 2026-10-09 21:35 UTCGHSA enrichmentGHSA-fh88-2p7h-7g9h · GitHub CVSS 6.1
  32. 2026-10-09 20:04 UTCEPSS rescoreEPSS 31% · 98th percentile
  33. 2026-10-09 17:46 UTCGHSA enrichmentGHSA-fh88-2p7h-7g9h · GitHub CVSS 6.1
  34. 2026-10-09 13:57 UTCGHSA enrichmentGHSA-fh88-2p7h-7g9h · GitHub CVSS 6.1
  35. 2026-10-09 10:07 UTCGHSA enrichmentGHSA-fh88-2p7h-7g9h · GitHub CVSS 6.1
  36. 2026-10-09 06:18 UTCGHSA enrichmentGHSA-fh88-2p7h-7g9h · GitHub CVSS 6.1
  37. 2026-10-09 02:30 UTCGHSA enrichmentGHSA-fh88-2p7h-7g9h · GitHub CVSS 6.1
  38. 2026-10-08 22:41 UTCGHSA enrichmentGHSA-fh88-2p7h-7g9h · GitHub CVSS 6.1
  39. 2026-10-08 18:53 UTCEG score recompute
  40. 2026-10-08 18:52 UTCGHSA enrichmentGHSA-fh88-2p7h-7g9h · GitHub CVSS 6.1
  41. 2026-10-08 16:40 UTCEPSS rescoreEPSS 31% · 98th percentile
  42. 2026-10-08 15:04 UTCGHSA enrichmentGHSA-fh88-2p7h-7g9h · GitHub CVSS 6.1
  43. 2026-10-08 11:15 UTCGHSA enrichmentGHSA-fh88-2p7h-7g9h · GitHub CVSS 6.1
  44. 2026-10-08 07:26 UTCGHSA enrichmentGHSA-fh88-2p7h-7g9h · GitHub CVSS 6.1
  45. 2026-10-08 03:37 UTCGHSA enrichmentGHSA-fh88-2p7h-7g9h · GitHub CVSS 6.1
  46. 2026-10-07 23:48 UTCEG score recompute
  47. 2026-10-07 23:47 UTCGHSA enrichmentGHSA-fh88-2p7h-7g9h · GitHub CVSS 6.1
  48. 2026-10-07 23:45 UTCEPSS rescoreEPSS 31% · 98th percentile
  49. 2026-10-07 19:58 UTCGHSA enrichmentGHSA-fh88-2p7h-7g9h · GitHub CVSS 6.1
  50. 2026-10-07 16:09 UTCGHSA enrichmentGHSA-fh88-2p7h-7g9h · GitHub CVSS 6.1
  51. 2026-10-07 12:20 UTCGHSA enrichmentGHSA-fh88-2p7h-7g9h · GitHub CVSS 6.1
  52. 2026-10-07 08:31 UTCGHSA enrichmentGHSA-fh88-2p7h-7g9h · GitHub CVSS 6.1
  53. 2026-10-07 04:42 UTCGHSA enrichmentGHSA-fh88-2p7h-7g9h · GitHub CVSS 6.1
  54. 2026-10-07 00:53 UTCGHSA enrichmentGHSA-fh88-2p7h-7g9h · GitHub CVSS 6.1
  55. 2026-10-06 21:04 UTCGHSA enrichmentGHSA-fh88-2p7h-7g9h · GitHub CVSS 6.1
  56. 2026-10-06 17:15 UTCEG score recompute
  57. 2026-10-06 17:15 UTCGHSA enrichmentGHSA-fh88-2p7h-7g9h · GitHub CVSS 6.1
  58. 2026-10-06 15:14 UTCEPSS rescoreEPSS 31% · 98th percentile
  59. 2026-10-06 13:26 UTCGHSA enrichmentGHSA-fh88-2p7h-7g9h · GitHub CVSS 6.1
  60. 2026-10-06 09:37 UTCGHSA enrichmentGHSA-fh88-2p7h-7g9h · GitHub CVSS 6.1
  61. 2026-10-06 05:46 UTCGHSA enrichmentGHSA-fh88-2p7h-7g9h · GitHub CVSS 6.1
  62. 2026-10-06 01:58 UTCGHSA enrichmentGHSA-fh88-2p7h-7g9h · GitHub CVSS 6.1
  63. 2026-10-05 22:08 UTCGHSA enrichmentGHSA-fh88-2p7h-7g9h · GitHub CVSS 6.1
  64. 2026-10-05 18:19 UTCEG score recompute
  65. 2026-10-05 18:19 UTCGHSA enrichmentGHSA-fh88-2p7h-7g9h · GitHub CVSS 6.1
  66. 2026-10-05 17:40 UTCEPSS rescoreEPSS 31% · 98th percentile
  67. 2026-10-05 14:31 UTCGHSA enrichmentGHSA-fh88-2p7h-7g9h · GitHub CVSS 6.1
  68. 2026-10-05 10:42 UTCGHSA enrichmentGHSA-fh88-2p7h-7g9h · GitHub CVSS 6.1
  69. 2026-10-05 06:54 UTCGHSA enrichmentGHSA-fh88-2p7h-7g9h · GitHub CVSS 6.1
  70. 2026-10-05 03:05 UTCGHSA enrichmentGHSA-fh88-2p7h-7g9h · GitHub CVSS 6.1
  71. 2026-10-04 23:17 UTCGHSA enrichmentGHSA-fh88-2p7h-7g9h · GitHub CVSS 6.1
  72. 2026-10-04 19:27 UTCGHSA enrichmentGHSA-fh88-2p7h-7g9h · GitHub CVSS 6.1
  73. 2026-10-04 15:38 UTCGHSA enrichmentGHSA-fh88-2p7h-7g9h · GitHub CVSS 6.1
  74. 2026-10-04 11:49 UTCGHSA enrichmentGHSA-fh88-2p7h-7g9h · GitHub CVSS 6.1
  75. 2026-10-04 08:00 UTCGHSA enrichmentGHSA-fh88-2p7h-7g9h · GitHub CVSS 6.1

Public detection templates

(1 reference)

A public Nuclei detection template is referenced for this CVE. A detection template checks whether a system is affected; it is not necessarily exploit code.

  • Nucleihttp/cves/2022/CVE-2022-24682.yaml
    Published Oct 12, 2025

    Zimbra Collaboration Suite < 8.8.15 - Improper Encoding

    Open source ↗

Frequently asked(6)

What is CVE-2022-24682?
CVE-2022-24682 is a critical-severity vulnerability; its CVE record was published on February 9, 2022. An issue was discovered in the Calendar feature in Zimbra Collaboration Suite 8.8.x before 8.8.15 patch 30 (update 1), as exploited in the wild starting in December 2021. An attacker could place HTML containing executable JavaScript inside element attributes. This markup becomes unescaped, causing…
When was the CVE record for CVE-2022-24682 published?
The CVE record for CVE-2022-24682 was published on February 9, 2022. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of August 7, 2026; the record at its source may have been updated since.
Is CVE-2022-24682 actively exploited?
Yes. CISA added CVE-2022-24682 to the Known Exploited Vulnerabilities catalog on February 25, 2022, affecting Synacor Zimbra Collaborate Suite (ZCS). KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate attention. No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation, and watch the vendor's advisory for the fix.
What is the CVSS score of CVE-2022-24682?
CVE-2022-24682 has a CVSS v3 base score of 6.1 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0 (CRITICAL).
Which products are affected by CVE-2022-24682?
CVE-2022-24682 affects Synacor Zimbra Collaborate Suite (ZCS).
How do I remediate CVE-2022-24682?
No fix for CVE-2022-24682 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The CVE record's description, written by its CNA (MITRE Corporation), states the affected versions: "An issue was discovered in the Calendar feature in Zimbra Collaboration Suite 8.8.x before 8.8.15 patch 30 (update 1), as exploited in the wild starting in December 2021." No release containing a fix is confirmed on record.

Dependency Blast Radius

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