CVE-2026-31940

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under NVD CVSS v3. EPSS exploit probability: 0.0%, top 86% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.5Exploit: NoneExposed: 0

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

Chamilo LMS is a learning management system. Prior to 1.11.38 and 2.0.0-RC.3, in main/lp/aicc_hacp.php, user-controlled request parameters are directly used to set the PHP session ID before loading global bootstrap. This leads to session fixation. This vulnerability is fixed in 1.11.38 and 2.0.0-RC.3.

CVSS v3
7.5
EG Score
7.5(medium)
EPSS
15.1%
KEV
Not listed

Published

April 10, 2026

Last Modified

April 17, 2026

Advisory Details (3)

Auto-updated Jun 15, 2026
Patch available. Sources: github_commit, github.
github Patch Available

Session Fixation (<=1.11.36) · Advisory · chamilo/chamilo-lms · GitHub

https://github.com/chamilo/chamilo-lms/security/advisories/GHSA-4gp7-cfjh-77gv
github_commit

commit e337b7cc74a0 (chamilo/chamilo-lms)

Fix landed in chamilo/chamilo-lms commit e337b7cc74a0 — awaiting tagged release

https://github.com/chamilo/chamilo-lms/commit/e337b7cc74a0276a0b4f91f9282204d20cac1869
github_commit

commit ce0192c62e48 (chamilo/chamilo-lms)

Fix landed in chamilo/chamilo-lms commit ce0192c62e48 — awaiting tagged release

https://github.com/chamilo/chamilo-lms/commit/ce0192c62e48c9d9474d915c541b3274844afbf9

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 41× 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. 2026-07-11 08:27 UTCEPSS rescore
  2. 2026-07-09 19:10 UTCEPSS rescore
  3. 2026-07-08 15:15 UTCEPSS rescore
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  15. 2026-06-28 14:07 UTCEPSS rescore
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  17. 2026-06-28 04:56 UTCEPSS rescore
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  1. 2026-06-22 14:25 UTCEPSS rescore
  2. 2026-06-21 14:56 UTCEPSS rescore
  3. 2026-06-21 14:56 UTCEPSS rescore
  4. 2026-06-21 01:59 UTCEPSS rescore
  5. 2026-06-19 19:25 UTCEPSS rescore
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  7. 2026-06-18 17:52 UTCEPSS rescore
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  9. 2026-06-17 17:53 UTCEPSS rescore
  10. 2026-06-16 17:52 UTCEPSS rescore
  11. 2026-06-15 17:49 UTCEPSS rescore
  12. 2026-06-15 04:18 UTCEG score recompute
  13. 2026-06-14 23:18 UTCEPSS rescore
  14. 2026-06-13 23:00 UTCEPSS rescore
  15. 2026-06-12 23:12 UTCEPSS rescore
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  17. 2026-06-11 19:51 UTCEG score recompute
  18. 2026-06-11 14:00 UTCEPSS rescore
  19. 2026-06-10 22:18 UTCEPSS rescore
  20. 2026-06-10 14:20 UTCEG score recompute
  21. 2026-06-10 13:22 UTCEPSS rescore
  22. 2026-06-10 01:27 UTCEG score recompute
  23. 2026-06-09 12:35 UTCEG score recompute
  24. 2026-06-08 14:17 UTCEPSS rescore
  25. 2026-06-08 14:17 UTCEPSS rescore
  26. 2026-06-08 09:42 UTCEG score recompute
  27. 2026-06-07 20:50 UTCEG score recompute
  28. 2026-06-07 15:25 UTCEPSS rescore
  29. 2026-06-07 15:25 UTCEPSS rescore
  30. 2026-06-07 15:25 UTCEPSS rescore
  31. 2026-06-07 07:58 UTCEG score recompute
  32. 2026-06-06 13:47 UTCEPSS rescore
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  38. 2026-06-04 13:12 UTCEPSS rescore
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  40. 2026-06-02 22:34 UTCEG score recompute
  41. 2026-06-02 20:13 UTCEPSS rescore
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  43. 2026-06-01 13:51 UTCEPSS rescore
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  45. 2026-05-31 22:30 UTCEPSS rescore
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  49. 2026-05-29 13:44 UTCEPSS rescore
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  63. 2026-05-23 15:21 UTCEPSS rescore
  64. 2026-05-23 00:08 UTCEG score recompute
  65. 2026-05-22 21:16 UTCEPSS rescore
  66. 2026-05-20 22:38 UTCEPSS rescore
  67. 2026-05-20 22:38 UTCEPSS rescore
  68. 2026-05-20 22:37 UTCEPSS rescore
  69. 2026-05-20 17:50 UTCEG score recompute
  70. 2026-05-20 11:22 UTCEPSS rescore
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  72. 2026-05-20 11:21 UTCEPSS rescore
  73. 2026-05-18 21:31 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2026-31940?
CVE-2026-31940 is a high vulnerability published on April 10, 2026. Chamilo LMS is a learning management system. Prior to 1.11.38 and 2.0.0-RC.3, in main/lp/aicc_hacp.php, user-controlled request parameters are directly used to set the PHP session ID before loading global bootstrap. This leads to session fixation. This vulnerability is fixed in 1.11.38 and…
When was CVE-2026-31940 disclosed?
CVE-2026-31940 was first published in the National Vulnerability Database on April 10, 2026, with the most recent update on April 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-31940 actively exploited?
CVE-2026-31940 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 15.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-31940?
CVE-2026-31940 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-31940?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-31940, 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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