CVE-2021-27736

PoC —

CVSS 3.1

6.5 medium

EPSS

1%p68

Published

Apr 22, 2021 (Apr 22, 2021)

Modified

Jun 17, 2026

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.

Vendors: fusionauth
Products: saml v2
Weakness: CWE-611
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

NVD CVE.org GitHub PoCs EPSS (1.3%)

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