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Jwt Attack CVE-2025-31335

MEDIUM
Improper Verification of Cryptographic Signature (CWE-347)
2025-03-28 cve@mitre.org
Information Disclosure Red Hat Jwt Attack Suse
4.0
CVSS 3.1 · NVD
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Vulnerability Assessment

Weakness
CWE
CWE-347
OWASP Top 10:2025
A04:2025 - Cryptographic Failures
ASVS 5.0
V11 - Cryptography Signature verification
Impact

CVSS score of 4.0 (MEDIUM). Attack characteristics: network attack vector, high complexity, no privileges required, no user interaction not required. EPSS exploitation probability: 0.15%.
Exploit ScenarioDerived

This vulnerability can be exploited remotely over the network. Successful exploitation could compromise the medium-severity affected system.
This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
Patch available 0.1% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 28, 2026

The OpenSAML C++ library before 3.3.1 allows forging of signed SAML messages via parameter manipulation (when using SAML bindings that rely on non-XML signatures). Rated medium severity (CVSS 4.0), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

Affected ProductsAI

See vendor advisory for affected versions.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

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Technical ContextAI · show details

This vulnerability is classified under CWE-347. The OpenSAML C++ library before 3.3.1 allows forging of signed SAML messages via parameter manipulation (when using SAML bindings that rely on non-XML signatures). Version information: before 3.3.1.

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Severity by source

NVD PRIMARY 4.0 MEDIUM
AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N
SUSE 3.1 LOW
AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N
Red Hat 4.0 MEDIUM

Primary rating from NVD.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
None
Integrity
Low
Availability
None

Lifecycle Timeline

2
Patch released
Apr 05, 2026 - 20:30 nvd
Patch available
CVE Published
Mar 28, 2025 - 06:15 nvd
MEDIUM 4.0

DescriptionCVE.org

The OpenSAML C++ library before 3.3.1 allows forging of signed SAML messages via parameter manipulation (when using SAML bindings that rely on non-XML signatures).

Executive ViewAI

Why It Matters

CVE-2025-31335 presents moderate security risk, a signature bypass vulnerability rated CVSS 4.0. Exploitation could compromise the security of affected deployments. Organizations should apply vendor updates when available and monitor for exploitation.

Business Impact: Low
Compensating Controls

Apply vendor patch. If patching is delayed: restrict network access and enable monitoring.

Threat Intelligence Overview

EPSS Score
0.1%
Top 65% exploitable
Data Quality
3 sources
Confidence: Low
NVD CVE.org EPSS Vendor

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity MEDIUM
CISA KEV No
Public POC No
EPSS 0.1%
Patch available Yes
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Defer
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
No
Human Impact
Low

Priority Score

20
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +20
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Information Disclosure MEDIUM

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.

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Same weakness CWE-347 – Improper Verification of Cryptographic Signature

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Vendor StatusVendor

SUSE

Severity: Low
Product Status
SUSE Linux Enterprise High Performance Computing 15 SP6 SUSE Linux Enterprise Module for Server Applications 15 SP6 SUSE Linux Enterprise Server 15 SP6 SUSE Linux Enterprise Server for SAP Applications 15 SP6 Fixed
SUSE Linux Enterprise High Performance Computing 15 SP7 SUSE Linux Enterprise Module for Server Applications 15 SP7 SUSE Linux Enterprise Server 15 SP7 SUSE Linux Enterprise Server for SAP Applications 15 SP7 Fixed
SUSE Linux Enterprise Server 16.0 Fixed
SUSE Linux Enterprise Server LTSS Extended Security 12 SP5 Fixed
openSUSE Leap 15.6 Fixed

References

Advisories & patches
ADVISORY https://www.suse.com/support/update/SUSE-SU-2025:01500/ ADVISORY https://www.suse.com/support/update/SUSE-SU-2025:14959/ ADVISORY https://www.suse.com/support/update/SUSE-SU-2025:1500/ ADVISORY https://www.suse.com/support/update/SUSE-SU-2025:1501/ REF https://git.shibboleth.net/view/?p=cpp-opensaml.git;a=commit;h=22a610b322e2178abd03e97cdbc8fb50b45efaee REF https://lists.debian.org/debian-security-announce/2025/msg00041.html REF https://shibboleth.atlassian.net/browse/CPPOST-126 REF https://shibboleth.net/community/advisories/secadv_20250313.txt

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