CVE-2021-36396

In Moodle, insufficient redirect handling made it possible to blindly bypass cURL blocked hosts/allowed ports restrictions, resulting in a blind SSRF risk.

Affected

Moodle

CVSS v3.1 NVD

7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

EPSS

1.43% chance of exploitation in the next 30 days, 73rd percentile

Published

2023-03-06

Updated

2025-03-05

Proof-of-concept exploits (2)

• T0X1Cx/CVE-2021-36396-Exploit22★ · 2024-07-07
• T0X1Cx/CVE-2021-36396-Moodle-Time-Based-SQLi-Exploit22★ · 2024-07-07

Security advisories

• https://moodle.org/mod/forum/discuss.php?d=424802
• advisories/GHSA-4rmj-w58m-fvch

References

• CVE Record
• NVD entry

Related

• CVE-2021-36393
• CVE-2024-28247
• CVE-2024-34361