CVE-2026-6399

MEDIUMNVD 4.44.4
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to NVD's CVSS score.

Score 4.4 from GitHub Security Advisory published 2026-05-20. NVD baseline CVSS 4.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
4.4EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 4.4Exploit: None knownExposed 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 CNA (Wordfence) lists yog2515 General Options versions up to and including 1.1.0 as affected. No release containing a fix is confirmed on record.

The General Options plugin for WordPress is vulnerable to Stored Cross-Site Scripting in versions up to and including 1.1.0. This is due to the use of sanitize_text_field() for output escaping in the Contact Number (ad_contact_number) field — a function that strips HTML tags but does not encode double-quote characters to their HTML entity equivalent ("). When the stored value is echoed inside a double-quoted HTML attribute (value="..."), an attacker-supplied double-quote character breaks out of the attribute context. Even with WordPress's wp_magic_quotes mechanism (which prefixes quotes with a backslash), the resulting \" sequence is NOT treated as an escaped quote by HTML parsers — the backslash is rendered as a literal character and the bare double-quote still closes the attribute. This makes it possible for authenticated attackers with Administrator-level access and above to inject arbitrary web scripts in the admin settings page that will execute whenever any administrator visits the General Options settings page.

CVSS v3
4.4
EG Score
4.4MEDIUMmedium confidence
EG Risk
20
EG Risk 20/100

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 (value × EchelonGraph’s weight)
Severity44% × 45%
The EG Score, 4.4 of 10.
Exploitation0.3% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (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, and watch the vendor's advisory for the fix.
EPSS PROB
0.3%
EPSS %ILE
22nd
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.

Exploitation none (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)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (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

Published

May 20, 2026

Last Modified

July 24, 2026

References (5)

Vendor Advisories for CVE-2026-6399(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 27× 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 97 of 225 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. 3 repeat rows among the latest 100 are merged into the row they repeat. The 128 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  2. 2026-10-12 15:48 UTCEG score recompute
  3. 2026-10-11 19:33 UTCEG score recompute
  4. 2026-10-11 16:48 UTCEG score recompute
  5. 2026-10-11 14:09 UTCEG score recompute
  6. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  7. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  8. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  9. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  10. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  11. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  12. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  13. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  14. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  15. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  16. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  17. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  18. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  19. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  20. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  21. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  22. 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  23. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  24. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  25. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.2% · 13th percentile
Show 72 more
  1. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  2. 2026-09-15 03:12 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  3. 2026-09-12 15:02 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  4. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  5. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  6. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  7. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  8. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  9. 2026-09-05 15:31 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  10. 2026-09-04 05:07 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  11. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  12. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  13. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  14. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  15. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  16. 2026-08-28 21:42 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  17. 2026-08-26 14:47 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  18. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  19. 2026-08-23 16:58 UTCEG score recompute
  20. 2026-08-23 16:58 UTCGHSA enrichmentGHSA-3hhp-2p2q-gg5w · GitHub CVSS 4.4
  21. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  22. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  23. 2026-08-21 23:35 UTCEG score recompute
  24. 2026-08-21 23:35 UTCGHSA enrichmentGHSA-3hhp-2p2q-gg5w · GitHub CVSS 4.4
  25. 2026-08-20 22:56 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  26. 2026-08-20 18:57 UTCEG score recompute
  27. 2026-08-20 18:57 UTCGHSA enrichmentGHSA-3hhp-2p2q-gg5w · GitHub CVSS 4.4
  28. 2026-08-19 17:04 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  29. 2026-08-18 13:49 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  30. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  31. 2026-08-17 09:55 UTCEG score recompute
  32. 2026-08-17 09:55 UTCGHSA enrichmentGHSA-3hhp-2p2q-gg5w · GitHub CVSS 4.4
  33. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  34. 2026-08-16 03:32 UTCEG score recompute
  35. 2026-08-16 03:32 UTCGHSA enrichmentGHSA-3hhp-2p2q-gg5w · GitHub CVSS 4.4
  36. 2026-08-16 02:15 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  37. 2026-08-15 01:31 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  38. 2026-08-14 23:53 UTCGHSA enrichmentGHSA-3hhp-2p2q-gg5w · GitHub CVSS 4.4
  39. 2026-08-14 02:04 UTCEG score recompute
  40. 2026-08-14 02:04 UTCGHSA enrichmentGHSA-3hhp-2p2q-gg5w · GitHub CVSS 4.4
  41. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  42. 2026-08-12 20:15 UTCEG score recompute
  43. 2026-08-12 20:15 UTCGHSA enrichmentGHSA-3hhp-2p2q-gg5w · GitHub CVSS 4.4
  44. 2026-08-12 13:51 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  45. 2026-08-11 22:27 UTCEG score recompute
  46. 2026-08-11 22:27 UTCGHSA enrichmentGHSA-3hhp-2p2q-gg5w · GitHub CVSS 4.4
  47. 2026-08-11 00:37 UTCEG score recompute
  48. 2026-08-11 00:37 UTCGHSA enrichmentGHSA-3hhp-2p2q-gg5w · GitHub CVSS 4.4
  49. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  50. 2026-08-09 23:22 UTCEG score recompute
  51. 2026-08-09 23:22 UTCGHSA enrichmentGHSA-3hhp-2p2q-gg5w · GitHub CVSS 4.4
  52. 2026-08-09 13:47 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  53. 2026-08-09 01:33 UTCEG score recompute
  54. 2026-08-09 01:33 UTCGHSA enrichmentGHSA-3hhp-2p2q-gg5w · GitHub CVSS 4.4
  55. 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  56. 2026-08-07 16:57 UTCEG score recompute
  57. 2026-08-07 16:57 UTCGHSA enrichmentGHSA-3hhp-2p2q-gg5w · GitHub CVSS 4.4
  58. 2026-08-06 19:08 UTCEG score recompute
  59. 2026-08-06 19:08 UTCGHSA enrichmentGHSA-3hhp-2p2q-gg5w · GitHub CVSS 4.4
  60. 2026-08-06 13:47 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  61. 2026-08-05 21:20 UTCEG score recompute
  62. 2026-08-05 21:20 UTCGHSA enrichmentGHSA-3hhp-2p2q-gg5w · GitHub CVSS 4.4
  63. 2026-08-05 19:17 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  64. 2026-08-04 15:10 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  65. 2026-08-04 10:39 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  66. 2026-08-03 16:55 UTCEG score recompute
  67. 2026-08-03 16:55 UTCGHSA enrichmentGHSA-3hhp-2p2q-gg5w · GitHub CVSS 4.4
  68. 2026-08-03 10:36 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  69. 2026-08-02 15:38 UTCEG score recompute
  70. 2026-08-02 15:38 UTCGHSA enrichmentGHSA-3hhp-2p2q-gg5w · GitHub CVSS 4.4
  71. 2026-08-02 02:27 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  72. 2026-08-01 17:48 UTCEG score recompute

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-6399?
CVE-2026-6399 is a medium-severity vulnerability; its CVE record was published on May 20, 2026. The General Options plugin for WordPress is vulnerable to Stored Cross-Site Scripting in versions up to and including 1.1.0. This is due to the use of sanitizetextfield() for output escaping in the Contact Number (adcontactnumber) field — a function that strips HTML tags but does not encode…
When was the CVE record for CVE-2026-6399 published?
The CVE record for CVE-2026-6399 was published on May 20, 2026. 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 July 24, 2026; the record at its source may have been updated since.
Is CVE-2026-6399 actively exploited?
CVE-2026-6399 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (22nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-6399?
CVE-2026-6399 has a CVSS v3 base score of 4.4 (NVD).
How do I remediate CVE-2026-6399?
No fix for CVE-2026-6399 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 CNA (Wordfence) lists yog2515 General Options versions up to and including 1.1.0 as affected. No release containing a fix is confirmed on record. The vendor advisories EchelonGraph has for CVE-2026-6399 are linked in the Vendor Advisories panel on this page.

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