VulnerabilityModified
CVE-2021-27736
FusionAuth fusionauth-samlv2 before 0.5.4 allows XXE attacks via a forged AuthnRequest or LogoutRequest because parseFromBytes uses javax.xml.parsers.DocumentBuilderFactory unsafely.
MEDIUM 6.5EPSS 1.28%
Does this matter?
Lower severity and a low EPSS score (1.28%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 6.5 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- EPSS
- 1.28% probability · 68th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-611
- Affected
- fusionauth/saml v2
- Source
- cve@mitre.org
References
- https://github.com/FusionAuth/fusionauth-samlv2/commit/c66fb689d50010662f705d5b585c6388ce555dbdPatch, Third Party Advisory
- https://github.com/FusionAuth/fusionauth-samlv2/compare/0.5.3...0.5.4Patch, Third Party Advisory
- https://www.compass-security.com/fileadmin/Research/Advisories/2021-03_CSNC-2021-004_FusionAuth_SAML_Library_XML_External_Entity.txtExploit, Third Party Advisory
- https://github.com/FusionAuth/fusionauth-samlv2/commit/c66fb689d50010662f705d5b585c6388ce555dbdPatch, Third Party Advisory
- https://github.com/FusionAuth/fusionauth-samlv2/compare/0.5.3...0.5.4Patch, Third Party Advisory
- https://www.compass-security.com/fileadmin/Research/Advisories/2021-03_CSNC-2021-004_FusionAuth_SAML_Library_XML_External_Entity.txtExploit, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.