CVSS 3.1
6.5 mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:NCVE-2021-27736
Medium (6.5) in fusionauth saml v2. EPSS 1.3% chance of exploitation in the next 30 days.
FusionAuth fusionauth-samlv2 before 0.5.4 allows XXE attacks via a forged AuthnRequest or LogoutRequest because parseFromBytes uses javax.xml.parsers.DocumentBuilderFactory unsafely.
Severity
- EPSS
- 1.3% chance of exploitation in the next 30 days; higher than 70% of CVEs (scores of 2026-10-31)
- CWE
- CWE-611
- Published
- Modified
- Record from
- the NVD, synced
Affected
- fusionauth:saml_v2
References
- https://github.com/FusionAuth/fusionauth-samlv2/commit/c66fb689d50010662f705d5b585c6388ce555dbd
- https://github.com/FusionAuth/fusionauth-samlv2/compare/0.5.3...0.5.4
- https://www.compass-security.com/fileadmin/Research/Advisories/2021-03_CSNC-2021-004_FusionAuth_SAML_Library_XML_External_Entity.txt
- https://github.com/FusionAuth/fusionauth-samlv2/commit/c66fb689d50010662f705d5b585c6388ce555dbd
- https://github.com/FusionAuth/fusionauth-samlv2/compare/0.5.3...0.5.4