CVE-2023-4224 — Unrestricted file upload in `/main/inc/ajax/dropbox

Unrestricted file upload in `/main/inc/ajax/dropbox.ajax.php` in Chamilo LMS <= v1.11.24 allows authenticated attackers with learner role to obtain remote code execution via uploading of PHP files.

01What is this vulnerability?

Unrestricted file upload in `/main/inc/ajax/dropbox.ajax.php` in Chamilo LMS <= v1.11.24 allows authenticated attackers with learner role to obtain remote code execution via uploading of PHP files.

02Affected products

Vendor	Product	Versions
Chamilo	Chamilo	0

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2023-11-28T07:19:31.720Z
• Last modified: 2024-08-02T07:17:12.200Z

09References

• support.chamilo.org — https://support.chamilo.org/projects/chamilo-18/wiki/security_issues#Issue-129-2…
• starlabs.sg — https://starlabs.sg/advisories/23/23-4224
• github.com — https://github.com/chamilo/chamilo-lms/commit/6f32625a012d5de2dfe8edbccb4ed14a85…
• github.com — https://github.com/chamilo/chamilo-lms/commit/f3d62b65ad60d68096c2674d5695339f04…
• github.com — https://github.com/chamilo/chamilo-lms/commit/e864127a440c2cab0eb62c113a04e2e904…