SSRF in Moodle
CVE-2023-35133
An issue in the logic used to check 0.0.0.0 against the cURL blocked hosts lists resulted in an SSRF risk. This flaw affects Moodle versions 4.2, 4.1 to 4.1.3, 4.0 to 4.0.8, 3.11 to 3.11.14, 3.9 to 3.9.21 and earlier unsupported versions.
Vulnerability class: SSRF (Server-Side Request Forgery)
EPSS: 0.008 (53.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
Affected products
- Moodle — versions 4.2.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- patrick@puiterwijk.org (x_refsource_REDHAT, issue-tracking)
- patrick@puiterwijk.org (vendor-advisory)
- patrick@puiterwijk.org (vendor-advisory)
- patrick@puiterwijk.org (Patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2023-35133?
- CVE-2023-35133 is a high-severity vulnerability in Moodle, classified under Server-Side Request Forgery (SSRF). CVSS score: 7.5/10. Published 2023-06-22.
- How severe is CVE-2023-35133?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2023-35133 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.