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CVE-2023-3545

24
FAUCET Score

CVE-2023-3545 is a critical improper sanitization vulnerability affecting Chamilo LMS versions up to 1.11.20, specifically on Windows and Apache installations. It allows unauthenticated attackers to bypass file upload security and achieve remote code execution by uploading a malicious .htaccess file. With a CVSS score of 9.8 (Critical), this vulnerability has a low attack complexity and can lead to complete compromise of confidentiality, integrity, and availability. While there is no known active exploitation, public exploit code, or significant community discussion, its high severity and potential for unauthenticated RCE make it a significant threat.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.11.20CPE matchmatch criteria
cpe:2.3:a:chamilo:chamilo:*:*:*:*:*:*:*:*
>= 0, <= 1.11.20CPE match
cpe:2.3:a:chamilo:chamilo:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.96%
Probability of exploitation in next 30 days
EPSS Percentile
78.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0196 is in the 67th percentile among its peer group of 36,897 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

github.com / chamilo/chamilo-lms/commit/dc7bfce429fbd843a95a57c184b6992c4d709549
Patch
starlabs.sg / advisories/23/23-3545
ExploitThird Party Advisory
support.chamilo.org / projects/chamilo-18/wiki/security_issues
Issue TrackingVendor Advisory