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    CVE-2026-82535

    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.

    Published:Sep 11, 2026
    Last Modified:Oct 1, 2026
    EPS:Sep 11, 2026
    EPSS Score:0.00474
    CVSS Score:6.1

    Affected Products

    Vendor
    Chamilo
    Product
    Chamilo Lms

    Exploits

    No exploit reference

    Related CVEs

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    CVE-2026-45144 (CVSS 8.9) — Chamilo LMS is an open-source learning management system. From 2.0.0 until 2.0.1, `GET /user/{username}` is an…
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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High