CVE-2026-82535

MediumCVSS 6.1/10Last modified Sep 24, 2026

Description

Chamilo LMS before 1.11.42 and 3.0.0 contains a stored cross-site scripting vulnerability that allows unauthenticated attackers to inject malicious script payloads into survey answers by computing deterministic invitation codes and bypassing authorization checks in the survey submission endpoint. Attackers can submit crafted answers containing unescaped HTML rendered in reporting views to execute arbitrary scripts in the browser sessions of teachers or administrators, enabling persistent backdoor account creation by exploiting the victim's authenticated session.

Metrics

CVSS 3.1 6.1/10CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Weakness enumeration

CWE-79

Affected software

Vendor	Product	Versions
chamilo	chamilo-lms	>= 1.11.0, <= 1.11.40; >= 2.0.0, <= 2.0.3

References

Timeline

Published: Sep 11, 2026
Last modified: Sep 24, 2026
NVD status: Deferred

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