CVE-2021-20280
MEDIUMMoodle 3.5.0-3.5.16, 3.8.0-3.8.7, 3.9.0-3.9.4, 3.10.0-3.10.1 - Stored XSS and SSRF in Text-Based Feedback
Title source: llmDescription
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 (6)
Core 6
Core References
Issue Tracking, Third Party Advisory x_refsource_misc
https://bugzilla.redhat.com/show_bug.cgi?id=1939037
Patch, Vendor Advisory x_refsource_misc
https://moodle.org/mod/forum/discuss.php?d=419651
Mailing List, Third Party Advisory vendor-advisory
x_refsource_fedora
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AFSNJ7XHVTC52RSRX2GBQFF3VEEAY2MS/
Mailing List, Third Party Advisory vendor-advisory
x_refsource_fedora
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UFH5DDMU5TZ3JT4Q52WMRAHACA5MHIMT/
Mailing List, Third Party Advisory vendor-advisory
x_refsource_fedora
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FGOMHMYM3WICJ6D6U22Z6LPJGT5A6MZM/
Exploit, Third Party Advisory, VDB Entry x_refsource_misc
http://packetstormsecurity.com/files/164817/Moodle-Cross-Site-Scripting-Server-Side-Request-Forgery.html
Scores
CVSS v3
5.4
EPSS
0.0072
EPSS Percentile
72.7%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Details
CWE
CWE-79
Status
published
Products (5)
fedoraproject/fedora
32
fedoraproject/fedora
33
fedoraproject/fedora
34
moodle/moodle
3.10 - 3.10.2Packagist
moodle/moodle
3.5.0 - 3.5.17
Published
Mar 15, 2021
Tracked Since
Feb 18, 2026