CVEvulnerability
CVE-2021-27736
6.5 MEDIUM
Official page ↗
- Status
- Modified
- Published
- 2021-04-22
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 6.5 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- CVSS 2.0 ([email protected])
- 4.0 MEDIUM — AV:N/AC:L/Au:S/C:P/I:N/A:N
- Weaknesses
- CWE-611
Description
FusionAuth fusionauth-samlv2 before 0.5.4 allows XXE attacks via a forged AuthnRequest or LogoutRequest because parseFromBytes uses javax.xml.parsers.DocumentBuilderFactory unsafely.
Affected configurations
• fusionauth saml v2 (< 0.5.4)
Related
Weakness · CWE (1)
- CWE-611 Improper Restriction of XML External Entity Reference weakness
References
- https://github.com/FusionAuth/fusionauth-samlv2/commit/c66fb689d50010662f705d5b585c6388ce555dbd Patch, Third Party Advisory
- https://github.com/FusionAuth/fusionauth-samlv2/compare/0.5.3...0.5.4 Patch, Third Party Advisory
- https://www.compass-security.com/fileadmin/Research/Advisories/2021-03_CSNC-2021-004_FusionAuth_SAML_Library_XML_External_Entity.txt Exploit, Third Party Advisory
- https://github.com/FusionAuth/fusionauth-samlv2/commit/c66fb689d50010662f705d5b585c6388ce555dbd Patch, Third Party Advisory
- https://github.com/FusionAuth/fusionauth-samlv2/compare/0.5.3...0.5.4 Patch, Third Party Advisory
- https://www.compass-security.com/fileadmin/Research/Advisories/2021-03_CSNC-2021-004_FusionAuth_SAML_Library_XML_External_Entity.txt Exploit, Third Party Advisory