CVE-2026-85385

CRITICALNVD 9.69.6—
EchelonGraph scoreHIGH confidence

Score 9.6 from GitHub Security Advisory (severity: HIGH) published 2026-09-16. NVD baseline CVSS 9.6; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 4 sources updated this week
9.6EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.6Exploit: None knownExposed: 0

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

Concrete CMS below 9.5.4 did not validate the user timezone value (uTimezone) on write and rendered it without output encoding on the Dashboard user management page, where Date::getTimezoneDisplayName() returns any non-IANA value unchanged. A stored cross-site scripting payload saved in this field executed in an administrator's browser when they viewed the affected user in the Dashboard, running script in the admin session (for example to read CSRF tokens, create administrator accounts, or change site settings). In Concrete CMS 9.5.3 the field became reachable by unauthenticated visitors through public registration; in Concrete CMS below 9.5.3, the same field was reachable by any authenticated user through the account profile editor. Exploitation required concrete.misc.user_timezones to be enabled (off by default), and the unauthenticated path additionally required public registration to be enabled. The Concrete CMS security team gave this vulnerability a CVSS v4.0 score of 7.7 with vector CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N. Thanks Suraj Bhosale for reporting.

CVSS v3
9.6
EG Score
9.6(high)
EG Risk
43(Track)
EG Risk 43/100SSVC: Track

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
Severity96% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
40%
KEV
Not listed

Published

September 16, 2026

Last Modified

September 21, 2026

References (1)

Vendor Advisories for CVE-2026-85385(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 46× in last 7d / 58× 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.

  1. 2026-09-25 07:31 UTCGHSA enrichment
  2. 2026-09-25 03:48 UTCGHSA enrichment
  3. 2026-09-25 00:06 UTCGHSA enrichment
  4. 2026-09-24 20:23 UTCGHSA enrichment
  5. 2026-09-24 16:40 UTCEG score recompute
  6. 2026-09-24 16:40 UTCGHSA enrichment
  7. 2026-09-24 14:04 UTCEPSS rescore
  8. 2026-09-24 12:45 UTCGHSA enrichment
  9. 2026-09-24 09:02 UTCGHSA enrichment
  10. 2026-09-24 05:20 UTCGHSA enrichment
  11. 2026-09-24 01:37 UTCGHSA enrichment
  12. 2026-09-23 21:55 UTCGHSA enrichment
  13. 2026-09-23 18:12 UTCEG score recompute
  14. 2026-09-23 18:12 UTCGHSA enrichment
  15. 2026-09-23 17:54 UTCEPSS rescore
  16. 2026-09-23 14:30 UTCGHSA enrichment
  17. 2026-09-23 10:48 UTCGHSA enrichment
  18. 2026-09-23 07:05 UTCGHSA enrichment
  19. 2026-09-23 03:23 UTCGHSA enrichment
  20. 2026-09-22 23:41 UTCGHSA enrichment
  21. 2026-09-22 19:58 UTCGHSA enrichment
  22. 2026-09-22 16:16 UTCEG score recompute
  23. 2026-09-22 16:16 UTCGHSA enrichment
  24. 2026-09-22 16:01 UTCEPSS rescore
  25. 2026-09-22 12:33 UTCGHSA enrichment
Show 33 more
  1. 2026-09-22 08:51 UTCGHSA enrichment
  2. 2026-09-22 05:03 UTCGHSA enrichment
  3. 2026-09-22 01:21 UTCGHSA enrichment
  4. 2026-09-21 21:38 UTCEG score recompute
  5. 2026-09-21 21:38 UTCGHSA enrichment
  6. 2026-09-21 21:09 UTCEPSS rescore
  7. 2026-09-21 17:55 UTCEG score recompute▲ 1.90
  8. 2026-09-21 17:55 UTCGHSA enrichment
  9. 2026-09-21 17:55 UTCNVD updateCVSS v3 → 9.6 · severity → CRITICAL
  10. 2026-09-21 14:00 UTCGHSA enrichment
  11. 2026-09-21 02:34 UTCEG score recompute
  12. 2026-09-21 02:33 UTCGHSA enrichment
  13. 2026-09-20 20:16 UTCEPSS rescore
  14. 2026-09-20 15:07 UTCGHSA enrichment
  15. 2026-09-20 03:40 UTCGHSA enrichment
  16. 2026-09-19 16:13 UTCEG score recompute
  17. 2026-09-19 16:13 UTCGHSA enrichment
  18. 2026-09-19 04:46 UTCEG score recompute
  19. 2026-09-19 04:46 UTCGHSA enrichment
  20. 2026-09-18 19:28 UTCEPSS rescore
  21. 2026-09-18 17:20 UTCGHSA enrichment
  22. 2026-09-18 05:53 UTCEG score recompute
  23. 2026-09-18 05:53 UTCGHSA enrichment
  24. 2026-09-17 19:32 UTCEPSS rescore
  25. 2026-09-17 18:26 UTCEG score recompute
  26. 2026-09-17 18:26 UTCGHSA enrichment
  27. 2026-09-17 18:00 UTCEG score recompute
  28. 2026-09-17 18:00 UTCGHSA enrichment
  29. 2026-09-17 06:51 UTCGHSA enrichment
  30. 2026-09-16 19:25 UTCGHSA enrichment
  31. 2026-09-16 17:29 UTCEG score recompute
  32. 2026-09-16 16:46 UTCEG score recompute
  33. 2026-09-16 16:44 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-85385?
CVE-2026-85385 is a critical vulnerability published on September 16, 2026. Concrete CMS below 9.5.4 did not validate the user timezone value (uTimezone) on write and rendered it without output encoding on the Dashboard user management page, where Date::getTimezoneDisplayName() returns any non-IANA value unchanged. A stored cross-site scripting payload saved in this field…
When was CVE-2026-85385 disclosed?
CVE-2026-85385 was first published in the National Vulnerability Database on September 16, 2026, with the most recent update on September 21, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-85385 actively exploited?
CVE-2026-85385 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 59.7% of all scored CVEs.
What is the CVSS score of CVE-2026-85385?
CVE-2026-85385 has a CVSS v3 base score of 9.6 (NVD).
How do I remediate CVE-2026-85385?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-85385, 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.

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