CVE-2023-3545 json
Chamilo LMS Htaccess File Upload Security Bypass
published 2023-11-28 2 y ago modified 2026-06-17 4 mo ago also EUVD-2023-44201
- cvss
- 9.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 2.4%
- EPSS 2.4% chance of exploitation in 30 days, percentile 84%
- public exploits
- 0
- none known
Summary
Improper sanitisation in `main/inc/lib/fileUpload.lib.php` in Chamilo LMS <= v1.11.20 on Windows and Apache installations allows unauthenticated attackers to bypass file upload security protections and obtain remote code execution via uploading of `.htaccess` file. This vulnerability may be exploited by privileged attackers or chained with unauthenticated arbitrary file write vulnerabilities, such as CVE-2023-3533, to achieve remote code execution.
Patch / fix
Exploit prediction
2.44% chance of exploitation in the next 30 days, higher than 84% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- starlabs.sg https://starlabs.sg/advisories/23/23-3545/ referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected products
- Chamilo Chamilo
Classification
- Weakness
-
- CWE-178 Improper Handling of Case Sensitivity
References
-
github.com
/chamilo/chamilo-lms/commit/dc7bfce429fbd843a95a57c184b6992c4d709549
patch
-
starlabs.sg
/advisories/23/23-3545/
third-party-advisory, exploit
-
support.chamilo.org
/projects/chamilo-18/wiki/security_issues#Issue-125-2023-07-13-Critical-impact-Moderate-risk-Htaccess-File-Upl
vendor-advisory, issue-tracking
Sources
- CVE List CVE-2023-3545
- NVD CVE-2023-3545
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