What is CVE-2025-52998?

CVE-2025-52998 is a critical-severity vulnerability in Chamilo Chamilo-Lms, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2026-03-02.

How severe is CVE-2025-52998?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Deserialization in Chamilo Chamilo-Lms

CVE-2025-52998

Chamilo is a learning management system. Prior to version 1.11.30, in the application, deserialization of data is performed, the data can be spoofed. An attacker can create objects of arbitrary classes, as well as fully control their properties, and thus modify the logic of the web application's operation. This issue has been patched in version 1.11.30.

Vulnerability class: Insecure Deserialization

Published 2026-03-02 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.004 (29.5th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 29th percentile — 29.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.000

Affected products

Chamilo Chamilo-Lms — versions < 1.11.30
Chamilo Lms

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

References

github.com/chamilo/chamilo-lms/security/advisories/GHSA-6mwg-2mw5-rx5v (Patch, Vendor Advisory)
github.com/chamilo/chamilo-lms/commit/ba7e15d8cfefcd451de939e98d461b17e72eb627 (Patch)
github.com/chamilo/chamilo-lms/releases/tag/v1.11.30 (Product, Release Notes)

Frequently asked questions

What is CVE-2025-52998?: CVE-2025-52998 is a critical-severity vulnerability in Chamilo Chamilo-Lms, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2026-03-02.
How severe is CVE-2025-52998?: Critical severity. CVSS v3 base score is 9.8 out of 10.