CVE-2023-34192

CRITICALNVD 9.09.0—
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2025-02-25), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 9.0 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, nvd
Trending — 4 sources updated this weekExploited in the wild
9.0EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 77%CVSS: 9.0Exploit: cisa kev · ssvc active · epss top5pct · epss high · public exploitExposed: 0

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

Cross Site Scripting vulnerability in Zimbra ZCS v.8.8.15 allows a remote authenticated attacker to execute arbitrary code via a crafted script to the /h/autoSaveDraft function.

CVSS v3
9.0
EG Score
9.0(high)
EG Risk
81(Attend)
EG Risk 81/100SSVC: Attend

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity90% × 45%
Exploitation100% × 40%
Automatability0% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
77%
EPSS %ILE
100%
KEV
⚠ Exploited

Published

July 6, 2023

Last Modified

October 27, 2025

Advisory Details (4)

Auto-updated Jun 1, 2026
⚠️ Active exploitation confirmed. Patch available. Sources: cisa.
cisa Patch Available🔴 Active Exploitation

Known Exploited Vulnerabilities Catalog | CISA

Known Exploited Vulnerabilities Catalog | CISA. Listed in CISA Known Exploited Vulnerabilities catalog.

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-34192
generic

Zimbra Security Advisories - Zimbra :: Tech Center

https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories
generic

Zimbra Responsible Disclosure Policy - Zimbra :: Tech Center

https://wiki.zimbra.com/wiki/Zimbra_Responsible_Disclosure_Policy
generic🔴 Active Exploitation

Security Center - Zimbra :: Tech Center

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 48× in last 7d / 218× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. 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. Most recent first.

Showing the most recent 100 of 724 total refreshes for this CVE.

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

Publicly available exploits

(1 reference)

Working exploit code is in the public domain. Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Nucleihttp/cves/2023/CVE-2023-34192.yaml
    First seen Jan 1, 2023

    Zimbra Collaboration Suite (ZCS) v.8.8.15 - Cross-Site Scripting

    Open source ↗

Related CVEs(same CWE)

Frequently asked(6)

What is CVE-2023-34192?
CVE-2023-34192 is a critical vulnerability published on July 6, 2023. Cross Site Scripting vulnerability in Zimbra ZCS v.8.8.15 allows a remote authenticated attacker to execute arbitrary code via a crafted script to the /h/autoSaveDraft function.
When was CVE-2023-34192 disclosed?
CVE-2023-34192 was first published in the National Vulnerability Database on July 6, 2023, with the most recent update on October 27, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-34192 actively exploited?
Yes. CISA added CVE-2023-34192 to the Known Exploited Vulnerabilities catalog on February 25, 2025, affecting Synacor Zimbra Collaboration Suite (ZCS). KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2023-34192?
CVE-2023-34192 has a CVSS v3 base score of 9.0 (NVD).
Which products are affected by CVE-2023-34192?
CVE-2023-34192 affects Synacor Zimbra Collaboration Suite (ZCS). The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.
How do I remediate CVE-2023-34192?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-34192, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2023-34192

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