High severity · published Mar 6, 2023
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
7.5
CVSS
1.4%
EPSS
No
On KEV
Description
In Moodle, insufficient redirect handling made it possible to blindly bypass cURL blocked hosts/allowed ports restrictions, resulting in a blind SSRF risk.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.4% · higher than 73% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MO
Moodle ·
3.11, 3.10 to 3.10.4, 3.9 to 3.9.7 and earlier unsupported versions · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-36396
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-36396
Patch
https://moodle.org/mod/forum/discuss.php?d=424802
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