CVE-2021-20280

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    CVE-2021-20280

    Published: 15 Mar 2021Last Modified: 8 Jul 2026

    Summary:

    Details: Text-based feedback answers required additional sanitizing to prevent stored XSS and blind SSRF risks in moodle before 3.10.2, 3.9.5, 3.8.8, 3.5.17.

    References: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AFSNJ7XHVTC52RSRX2GBQFF3VEEAY2MS/, https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FGOMHMYM3WICJ6D6U22Z6LPJGT5A6MZM/, https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UFH5DDMU5TZ3JT4Q52WMRAHACA5MHIMT/, https://bugzilla.redhat.com/show_bug.cgi?id=1939037, https://moodle.org/mod/forum/discuss.php?d=419651, http://packetstormsecurity.com/files/164817/Moodle-Cross-Site-Scripting-Server-Side-Request-Forgery.html

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 46574904afd39578fa4146bf1fc5c401ac680aa6
    Fixed -5a1b6a9d50f5af06ac03fd9022c3fd4d23f60602

    Affected versions

    v3.5.16
    v3.5.15
    v3.5.14
    v3.5.13
    v3.5.12
    v3.5.11
    v3.5.10
    v3.5.9
    v3.5.8
    v3.5.7
    v3.5.6
    v3.5.5
    v3.5.4
    v3.5.3
    v3.5.2
    v3.5.1
    v3.5.0

    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
    CVE-2021-20280 | CVE-DB