Chamilo is a learning management system. Versions prior to 1.11.34 have a Stored XSS through insecure file uploads in Social Networks. Through it, a low-privilege user can execute arbitrary code in the admin user inbox, allowing takeover of the admin account. Version 1.11.34 fixes the issue.
CVE-2025-55208
CRITICALPre-NVD 9.09.0
EchelonGraph scoreLOW confidence
This critical-severity CVE scores 9.0 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit-prediction score not yet available (the EPSS model rescores nightly; freshly-published CVEs typically appear within 48 hours). 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: secondary
9.0EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
- High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.0Exploit: None knownExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 9.0
- EG Score
- 9.0(low)
- EG Risk
- 45(Track)EG Risk 45/100SSVC: 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 computedSeverity90% × 45%Exploitation0% × 40%Automatability30% × 15%Action: Routine — remediate on your standard cadence. - EPSS PROB
- 0%
- EPSS %ILE
- 23%
- KEV
- Not listed
Published
March 5, 2026
Last Modified
June 17, 2026
Advisory Details (1)
Auto-updated Jul 28, 2026Patch available. Sources: github.
github Patch Available
Stored Cross Site Scripting on Social Networks Uploaded Files (<=1.11.32) · Advisory · chamilo/chamilo-lms · GitHub
https://github.com/chamilo/chamilo-lms/security/advisories/GHSA-2vq2-826h-6hp6Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 4× in last 7d / 4× 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.
- 2026-08-01 04:15 UTCEPSS rescore
- 2026-07-30 16:27 UTCEPSS rescore
- 2026-07-28 15:35 UTCEPSS rescore
- 2026-07-27 13:51 UTCEG score recompute
Related CVEs(same CWE)
Frequently asked(5)
What is CVE-2025-55208?
CVE-2025-55208 is a critical vulnerability published on March 5, 2026. Chamilo is a learning management system. Versions prior to 1.11.34 have a Stored XSS through insecure file uploads in Social Networks. Through it, a low-privilege user can execute arbitrary code in the admin user inbox, allowing takeover of the admin account. Version 1.11.34 fixes the issue.
When was CVE-2025-55208 disclosed?
CVE-2025-55208 was first published in the National Vulnerability Database on March 5, 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-2025-55208 actively exploited?
CVE-2025-55208 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 76.9% of all scored CVEs.
What is the CVSS score of CVE-2025-55208?
CVE-2025-55208 has a CVSS v3 base score of 9.0 (NVD). The EG score is currently aggregating — additional source signals are being incorporated as they become available..
How do I remediate CVE-2025-55208?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-55208, 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.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2025-55208
Is Your Infrastructure Affected by CVE-2025-55208?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.