CVE-2021-20280

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.

Affected

moodle

CVSS v3.1 NVD

5.4 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

CVSS v2.0 NVD

3.5 LOWAV:N/AC:M/Au:S/C:N/I:P/A:N

EPSS

1.27% chance of exploitation in the next 30 days, 69th percentile

Published

2021-03-15

Updated

2024-08-03

Proof-of-concept exploits (1)

• http://packetstormsecurity.com/files/164817/Moodle-Cross-Site-Scripting-Server-Side-Reque…

Security advisories

• https://moodle.org/mod/forum/discuss.php?d=419651
• https://bugzilla.redhat.com/show_bug.cgi?id=1939037
• advisories/GHSA-x2jp-hh65-4xvf

References

• CVE Record
• NVD entry