CVE-2021-27736

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Published Apr 22, 2021 CVSS 3.1 · 6.5 Medium EPSS 1.3% KEV · Not listed

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 Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

n/a

n/a

affected

Version	Status	Constraints
`n/a`	affected	—

Configuration 1 [-]

cpe:2.3:a:fusionauth:saml_v2:*:*:*:*:*:*:*:*

No data.

No data available yet.

Remediation

No solution or workaround provided in the CVE record

Tracking

Sign in to view the affected projects.

Advisories

Source	ID	Title
EUVD	EUVD-2021-14478	FusionAuth fusionauth-samlv2 before 0.5.4 allows XXE attacks via a forged AuthnRequest or LogoutRequest because parseFromBytes uses javax.xml.parsers.DocumentBuilderFactory unsafely.

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact None

Availability Impact None

User Interaction None

No CVSS v3.0

Access Vector Network

Access Complexity Low

Authentication Single

Confidentiality Impact Partial

Integrity Impact None

Availability Impact None

This CVE is not in the KEV list.

Exploit prediction score: 1.3% (1.316% probability within 30 days)

Key SSVC decision points have not yet been added.

References

Link	Providers
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

History

No history.

Subscriptions

Fusionauth Saml V2

Weaknesses

CWE-611

Sources

CVE record Updated: Aug 3, 2024, 9:26 PM

Status: PUBLISHED
Assigner: mitre
Published: Apr 22, 2021, 1:14 PM
Updated: Aug 3, 2024, 9:26 PM
Reserved: Feb 25, 2021, 12:00 AM

View source JSON

Vulnrichment No data

No data.

NVD Updated: Jun 17, 2026, 3:45 AM

Status: Modified
Published: Apr 22, 2021, 2:15 PM
Modified: Jun 17, 2026, 3:45 AM

View source JSON

Red Hat No data

No data.

OpenCVE enrichment No data

No data.

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