CVE-2025-52563

MEDIUMNVD 6.16.1—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.1 under NVD CVSS v3. EPSS exploit probability: 0.2%, top 95% 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
6.1EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.1Exploit: None knownExposed: 0

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

Chamilo is a learning management system. Prior to version 1.11.30, there is a reflected cross-site scripting (XSS) vulnerability due to insufficient sanitization of the page parameter in the session/add_users_to_session.php endpoint. This issue has been patched in version 1.11.30.

CVSS v3
6.1
EG Score
6.1(medium)
EG Risk
32(Track)
EG Risk 32/100SSVC: 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
Severity61% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
5%
KEV
Not listed

Published

March 2, 2026

Last Modified

June 17, 2026

Advisory Details (2)

Auto-updated Aug 4, 2026
Patch available. Sources: github_release, github.
github Patch Available

Reflected XSS via page parameter (<=1.11.28) · Advisory · chamilo/chamilo-lms · GitHub

https://github.com/chamilo/chamilo-lms/security/advisories/GHSA-h3m8-53j3-xjx8
github_release Patch Available

v1.11.30

Patch available: chamilo/chamilo-lms v1.11.30

https://github.com/chamilo/chamilo-lms/releases/tag/v1.11.30

Weakness Classification(3)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 32× 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. 2026-09-19 15:42 UTCEPSS rescore
  2. 2026-09-18 19:27 UTCEPSS rescore
  3. 2026-09-18 19:27 UTCEPSS rescore
  4. 2026-09-18 18:36 UTCOSV refresh
  5. 2026-09-17 19:29 UTCEPSS rescore
  6. 2026-09-16 14:07 UTCEPSS rescore
  7. 2026-09-16 05:14 UTCEPSS rescore
  8. 2026-09-13 16:46 UTCEPSS rescore
  9. 2026-09-12 15:00 UTCEPSS rescore
  10. 2026-09-11 14:52 UTCEPSS rescore
  11. 2026-09-11 09:36 UTCEPSS rescore
  12. 2026-09-10 09:34 UTCEPSS rescore
  13. 2026-09-08 21:59 UTCEPSS rescore
  14. 2026-09-07 16:00 UTCEPSS rescore
  15. 2026-09-06 13:47 UTCEPSS rescore
  16. 2026-09-05 15:28 UTCEPSS rescore
  17. 2026-09-04 05:06 UTCEPSS rescore
  18. 2026-09-02 14:11 UTCEPSS rescore
  19. 2026-09-01 13:53 UTCEPSS rescore
  20. 2026-09-01 04:38 UTCEPSS rescore
  21. 2026-08-30 22:04 UTCOSV refresh
  22. 2026-08-30 19:16 UTCEPSS rescore
  23. 2026-08-30 01:21 UTCEPSS rescore
  24. 2026-08-28 21:40 UTCEPSS rescore
  25. 2026-08-27 14:24 UTCEPSS rescore
Show 43 more
  1. 2026-08-26 14:45 UTCEPSS rescore
  2. 2026-08-25 13:48 UTCEPSS rescore
  3. 2026-08-24 14:16 UTCEPSS rescore
  4. 2026-08-24 09:22 UTCEPSS rescore
  5. 2026-08-23 00:18 UTCEPSS rescore
  6. 2026-08-21 23:48 UTCEPSS rescore
  7. 2026-08-20 22:54 UTCEPSS rescore
  8. 2026-08-19 17:03 UTCEPSS rescore
  9. 2026-08-18 13:47 UTCEPSS rescore
  10. 2026-08-17 13:46 UTCEPSS rescore
  11. 2026-08-16 14:55 UTCEPSS rescore
  12. 2026-08-16 02:13 UTCEPSS rescore
  13. 2026-08-15 01:29 UTCEPSS rescore
  14. 2026-08-14 08:45 UTCEG score recompute
  15. 2026-08-13 21:59 UTCEPSS rescore
  16. 2026-08-13 00:37 UTCEG score recompute
  17. 2026-08-12 13:50 UTCEPSS rescore
  18. 2026-08-12 13:50 UTCEPSS rescore
  19. 2026-08-11 13:42 UTCEPSS rescore
  20. 2026-08-11 06:16 UTCEG score recompute
  21. 2026-08-10 23:59 UTCEPSS rescore
  22. 2026-08-10 08:13 UTCEG score recompute
  23. 2026-08-09 13:46 UTCEPSS rescore
  24. 2026-08-09 08:23 UTCEG score recompute
  25. 2026-08-08 16:36 UTCEPSS rescore
  26. 2026-08-07 20:20 UTCEG score recompute
  27. 2026-08-07 16:26 UTCEPSS rescore
  28. 2026-08-06 13:46 UTCEPSS rescore
  29. 2026-08-06 02:51 UTCEG score recompute
  30. 2026-08-05 19:16 UTCEPSS rescore
  31. 2026-08-04 15:09 UTCEPSS rescore
  32. 2026-08-04 15:09 UTCEPSS rescore
  33. 2026-08-04 10:37 UTCEPSS rescore
  34. 2026-08-04 04:38 UTCEG score recompute
  35. 2026-08-03 10:35 UTCEPSS rescore
  36. 2026-08-02 19:13 UTCEG score recompute
  37. 2026-08-02 02:26 UTCEPSS rescore
  38. 2026-08-01 04:15 UTCEPSS rescore
  39. 2026-07-30 16:27 UTCEPSS rescore
  40. 2026-07-30 01:30 UTCEPSS rescore
  41. 2026-07-28 15:35 UTCEPSS rescore
  42. 2026-07-27 13:59 UTCEG score recompute
  43. 2026-07-27 13:57 UTCOSV refresh

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Frequently asked(5)

What is CVE-2025-52563?
CVE-2025-52563 is a medium vulnerability published on March 2, 2026. Chamilo is a learning management system. Prior to version 1.11.30, there is a reflected cross-site scripting (XSS) vulnerability due to insufficient sanitization of the page parameter in the session/addusersto_session.php endpoint. This issue has been patched in version 1.11.30.
When was CVE-2025-52563 disclosed?
CVE-2025-52563 was first published in the National Vulnerability Database on March 2, 2026, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-52563 actively exploited?
CVE-2025-52563 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 95.0% of all scored CVEs.
What is the CVSS score of CVE-2025-52563?
CVE-2025-52563 has a CVSS v3 base score of 6.1 (NVD).
How do I remediate CVE-2025-52563?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-52563, 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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