CVE-2023-3545

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2023-11-28. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 2%CVSS: 9.8Exploit: NoneExposed: 0

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

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.

CVSS v3
9.8
EG Score
9.8(medium)
EPSS
78.1%
KEV
Not listed

Published

November 28, 2023

Last Modified

November 21, 2024

Advisory Details (2)

Auto-updated Jun 7, 2026
🔬 Proof of concept available. Upstream fix merged — awaiting tagged release. Sources: github_commit.
generic🟡 PoC Available

(CVE-2023-3545) Chamilo LMS Htaccess File Upload Security Bypass | STAR Labs

https://starlabs.sg/advisories/23/23-3545/
github_commit

commit dc7bfce429fb (chamilo/chamilo-lms)

Fix landed in chamilo/chamilo-lms commit dc7bfce429fb — awaiting tagged release

https://github.com/chamilo/chamilo-lms/commit/dc7bfce429fbd843a95a57c184b6992c4d709549

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 14× in last 7d / 49× 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.

Showing the most recent 100 of 101 total refreshes for this CVE.

  1. 2026-07-18 10:03 UTCEPSS rescore
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  75. 2026-05-24 13:15 UTCEG score recompute

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2023-3545?
CVE-2023-3545 is a critical vulnerability published on November 28, 2023. 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…
When was CVE-2023-3545 disclosed?
CVE-2023-3545 was first published in the National Vulnerability Database on November 28, 2023, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-3545 actively exploited?
CVE-2023-3545 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 78.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2023-3545?
CVE-2023-3545 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2023-3545?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-3545, 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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