CVE-2026-82535

Chamilo LMS Stored XSS via Survey Answer Submission in reporting.php

Published: Sep 11, 2026Updated: Sep 24, 2026 Sources: CVE List NVDCWE-79

6.1MEDIUM

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.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:LAttack Complexity

Low

PR:NPrivileges Required

None

UI:RUser Interaction

Required

Scope

S:CScope

Changed

Impact

C:LConfidentiality

Low

I:LIntegrity

Low

A:NAvailability

None

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Weaknesses

CWE-79

Affected Products

chamilo

oss-projectaka chamilo-lms

chamilo-lmsOn-premWeb App

Enterprise Software / collaboration-groupware

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques

Execution

Initial Access

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References

https://github.com/chamilo/chamilo-lms/security/advisories/GHSA-m3wr-p8wj-jmf6

github.com

https://github.com/chamilo/chamilo-lms/releases/tag/v3.0.0

github.com

https://github.com/chamilo/chamilo-lms/commit/be45f2f2a29319afbbf9ce27d094698911799d10

github.com

and 3 more references View all →

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