CVE-2023-36661

HIGH 7.5CVE-2023-36661 · Published 25/06/2023 · updated 17/06/2026

In short

CVE-2023-36661 is a HIGH (CVSS 7.5) vulnerability affecting xmltooling (shibboleth).
Chance of exploitation in the next 30 days (EPSS): 2.9%, higher than 86.9% of all vulnerabilities.
Fix: update to 3.2.4 or later.

Package	Affected versions	Patched versions
xmltooling shibboleth	`< 3.2.4`	`3.2.4`

Description

Shibboleth XMLTooling before 3.2.4, as used in OpenSAML and Shibboleth Service Provider, allows SSRF via a crafted KeyInfo element. (This is fixed in, for example, Shibboleth Service Provider 3.4.1.3 on Windows.)

References

shibboleth.net/community/advisories/secadv_20230612.txt · Vendor Advisory
debian.org/security/2023/dsa-5432 · Third Party Advisory

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