CVE-2026-100524

MEDIUMPre-NVD 5.45.4—
EchelonGraph scoreHIGH confidence

Score 5.4 from GitHub Security Advisory published 2026-09-26. A secondary CVSS source baseline 5.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
5.4EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.1%CVSS: 5.4Exploit: None knownExposed services: Not assessed

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

Cotonti through 1.0.0 contains a cross-site request forgery vulnerability in the extensions manager that allows attackers to perform state-changing actions without anti-CSRF token validation. Attackers can craft links or embed images to force administrators to install, update, pause, or unpause extensions by tricking them into visiting a malicious page while authenticated.

CVSS v3
5.4
EG Score
5.4MEDIUMhigh confidence
EG Risk
24
EG Risk 24/100CISA SSVC

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
Severity54% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
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
0.1%
EPSS %ILE
1st
KEV
Not listed

CISA SSVCTrack 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). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

September 26, 2026

Last Modified

September 30, 2026

Advisory Details (5)

Auto-updated Sep 26, 2026
No patch confirmed yet. Sources: github_pr.
generic

Cotonti through 1.0.0 Cross-Site Request Forgery via Extensions Manager | Advisories | VulnCheck

https://www.vulncheck.com/advisories/cotonti-through-1.0.0-cross-site-request-forgery-via-extensions-manager
github_pr

Security hardening (batch 1): CSRF tokens, XSS escaping, redirect validation, CSPRNG tokens, upload & object-injection fixes

Upstream fix in progress (PR #1908 · Cotonti/Cotonti, state=open)

https://github.com/Cotonti/Cotonti/pull/1908
generic

Security: ~60 confirmed vulnerabilities in current master (f43f1fc) — CSRF, XSS, open redirect, weak tokens, upload/RCE chains (coordinated disclosure via VulnCheck CNA) · Issue #1907 · Cotonti/Cotonti · GitHub

https://github.com/Cotonti/Cotonti/issues/1907
generic

Cotonti/system/admin/admin.extensions.php at 1.0.0 · Cotonti/Cotonti · GitHub

https://github.com/Cotonti/Cotonti/blob/1.0.0/system/admin/admin.extensions.php
generic

GitHub - Cotonti/Cotonti: Fast, reliable and flexible PHP CMF/CMS · GitHub

https://github.com/Cotonti/Cotonti

Vendor Advisories for CVE-2026-100524(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 21× in last 7d / 27× 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. 2026-10-04 11:05 UTCEG score recompute
  2. 2026-10-04 11:05 UTCGHSA enrichment
  3. 2026-10-03 14:25 UTCEPSS rescore
  4. 2026-10-03 08:42 UTCEG score recompute
  5. 2026-10-03 08:42 UTCGHSA enrichment
  6. 2026-10-02 06:18 UTCEG score recompute
  7. 2026-10-02 06:18 UTCGHSA enrichment
  8. 2026-10-01 19:49 UTCEPSS rescore
  9. 2026-10-01 03:54 UTCEG score recompute
  10. 2026-10-01 03:54 UTCGHSA enrichment
  11. 2026-09-30 15:02 UTCEPSS rescore
  12. 2026-09-30 01:30 UTCEG score recompute
  13. 2026-09-30 01:30 UTCGHSA enrichment
  14. 2026-09-30 00:39 UTCEG score recompute
  15. 2026-09-30 00:38 UTCGHSA enrichment
  16. 2026-09-29 15:20 UTCEPSS rescore
  17. 2026-09-29 08:33 UTCEG score recompute
  18. 2026-09-29 08:33 UTCGHSA enrichment
  19. 2026-09-28 13:50 UTCEPSS rescore
  20. 2026-09-28 06:10 UTCEG score recompute
  21. 2026-09-28 06:10 UTCGHSA enrichment
  22. 2026-09-27 03:46 UTCEG score recompute
  23. 2026-09-27 03:46 UTCGHSA enrichment
  24. 2026-09-26 15:58 UTCEPSS rescore
  25. 2026-09-26 01:20 UTCEG score recompute
Show 2 more
  1. 2026-09-26 01:12 UTCEG score recompute
  2. 2026-09-26 01:09 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-100524?
CVE-2026-100524 is a medium vulnerability published on September 26, 2026. Cotonti through 1.0.0 contains a cross-site request forgery vulnerability in the extensions manager that allows attackers to perform state-changing actions without anti-CSRF token validation. Attackers can craft links or embed images to force administrators to install, update, pause, or unpause…
When was CVE-2026-100524 disclosed?
CVE-2026-100524 was first published on September 26, 2026, with the most recent update on September 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-100524 actively exploited?
CVE-2026-100524 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.1% probability of exploitation in the next 30 days (1st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-100524?
CVE-2026-100524 has a CVSS base score of 5.4 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-100524?
No fix for CVE-2026-100524 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 vendor advisories EchelonGraph has for CVE-2026-100524 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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