CVE-2026-45143

CRITICALPre-NVD 9.09.0—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.0 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.5% (39th percentile of EPSS-scored CVEs). 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, 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: 0.5%CVSS: 9.0Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Chamilo LMS is an open-source learning management system. From 2.0.0 through at least 2.1.0, Chamilo LMS stores private Message.content without server-side sanitization and renders it as HTML in assets/vue/views/message/MessageShow.vue and public/main/template/default/message/view_message.html.twig. An authenticated low-privilege user, including a student, can directly address crafted message content to an administrator because the message creation flow permits a sender to select another user as the recipient. The content executes in the recipient's browser when the recipient opens the routine inbox or message view, without requiring a link click, and can expose session credentials or permit actions as the administrator. This vulnerability is fixed in 2.0.1.

CVSS v3
9.0
EG Score
9.0CRITICALmedium confidence
EG Risk
41
EG Risk 41/100CISA 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
Severity90% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.5%
EPSS %ILE
39th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (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 17, 2026

Last Modified

September 29, 2026

Advisory Details (3)

Auto-updated Sep 17, 2026
Patch available. Sources: github, github_commit, github_release.
github_release Patch Available

v2.0.1

Patch available: chamilo/chamilo-lms v2.0.1

https://github.com/chamilo/chamilo-lms/releases/tag/v2.0.1
github_commit

commit b2c91c021fc5 (chamilo/chamilo-lms)

Fix landed in chamilo/chamilo-lms commit b2c91c021fc5 — awaiting tagged release

https://github.com/chamilo/chamilo-lms/commit/b2c91c021fc5ab7e91feb4927c4c676f77034ac5
github Patch Available

Student-to-admin stored XSS in private messages via v-html (<=2.0.0) · Advisory · chamilo/chamilo-lms · GitHub

https://github.com/chamilo/chamilo-lms/security/advisories/GHSA-x88v-rg6r-vqq6

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 12× 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. 2026-10-05 03:18 UTCEG score recompute
  2. 2026-10-04 23:22 UTCEPSS rescore
  3. 2026-10-03 17:26 UTCEG score recompute
  4. 2026-10-03 14:25 UTCEPSS rescore
  5. 2026-10-02 20:40 UTCEG score recompute
  6. 2026-10-01 22:37 UTCEG score recompute
  7. 2026-10-01 19:50 UTCEPSS rescore
  8. 2026-09-30 17:17 UTCEG score recompute
  9. 2026-09-30 15:03 UTCEPSS rescore
  10. 2026-09-29 18:21 UTCEG score recompute
  11. 2026-09-29 01:23 UTCEG score recompute
  12. 2026-09-28 17:06 UTCEG score recompute
  13. 2026-09-27 16:10 UTCEG score recompute
  14. 2026-09-27 13:48 UTCEPSS rescore
  15. 2026-09-26 19:23 UTCEG score recompute
  16. 2026-09-26 15:58 UTCEPSS rescore
  17. 2026-09-26 02:45 UTCEG score recompute
  18. 2026-09-24 21:24 UTCEG score recompute
  19. 2026-09-24 21:02 UTCEG score recompute
  20. 2026-09-24 15:58 UTCEG score recompute
  21. 2026-09-23 19:10 UTCEG score recompute
  22. 2026-09-23 17:53 UTCEPSS rescore
  23. 2026-09-22 17:50 UTCEG score recompute
  24. 2026-09-22 01:16 UTCEG score recompute
  25. 2026-09-21 00:16 UTCEG score recompute
Show 7 more
  1. 2026-09-20 20:15 UTCEPSS rescore
  2. 2026-09-19 19:08 UTCEG score recompute
  3. 2026-09-18 22:17 UTCEG score recompute
  4. 2026-09-18 19:28 UTCEPSS rescore
  5. 2026-09-17 21:20 UTCEG score recompute
  6. 2026-09-17 20:25 UTCEG score recompute
  7. 2026-09-17 20:24 UTCMITRE cvelistV5first tracked

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Frequently asked(5)

What is CVE-2026-45143?
CVE-2026-45143 is a critical vulnerability published on September 17, 2026. Chamilo LMS is an open-source learning management system. From 2.0.0 through at least 2.1.0, Chamilo LMS stores private Message.content without server-side sanitization and renders it as HTML in assets/vue/views/message/MessageShow.vue and…
When was CVE-2026-45143 disclosed?
CVE-2026-45143 was first published on September 17, 2026, with the most recent update on September 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-45143 actively exploited?
CVE-2026-45143 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (39th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-45143?
CVE-2026-45143 has a CVSS base score of 9.0 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-45143?
A fix for CVE-2026-45143 is available: update to the fixed version the vendor names in its advisory.

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