Red Hat Keycloak/Single Sign-On Verification Policy certificate host validation

CVSS Meta Temp Score
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Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.7$5k-$25k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in Red Hat Keycloak and Single Sign-On. Affected is an unknown function of the component Verification Policy. Executing a manipulation can lead to certificate host validation. This vulnerability is registered as CVE-2025-3501. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability has been found in Red Hat Keycloak and Single Sign-On (affected version unknown) and classified as critical. This vulnerability affects an unknown functionality of the component Verification Policy. The manipulation with an unknown input leads to a certificate host validation vulnerability. The CWE definition for the vulnerability is CWE-297. The product communicates with a host that provides a certificate, but the product does not properly ensure that the certificate is actually associated with that host. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

A flaw was found in Keycloak. By setting a verification policy to 'ALL', the trust store certificate verification is skipped, which is unintended.

The advisory is shared for download at access.redhat.com. This vulnerability was named CVE-2025-3501 since 04/10/2025. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 06/09/2025). The MITRE ATT&CK project declares the attack technique as T1587.003.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-12660). Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.7
VulDB Meta Temp Score: 7.7

VulDB Base Score: 7.3
VulDB Temp Score: 7.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 8.2
CNA Vector (redhat): 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Certificate host validation
CWE: CWE-297 / CWE-295 / CWE-287
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

04/10/2025 🔍
04/29/2025 +19 days 🔍
04/29/2025 +0 days 🔍
06/09/2025 +41 days 🔍

Sourcesinfo

Vendor: redhat.com

Advisory: access.redhat.com
Status: Confirmed

CVE: CVE-2025-3501 (🔍)
GCVE (CVE): GCVE-0-2025-3501
GCVE (VulDB): GCVE-100-306580
EUVD: 🔍

Entryinfo

Created: 04/29/2025 23:39
Updated: 06/09/2025 17:04
Changes: 04/29/2025 23:39 (61), 04/30/2025 10:52 (1), 06/09/2025 17:04 (1)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

Discussion

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