OpenSSL TLS1.2: Client Can Use Weak Digest in CertificateRequest
CVE-2025-12889 Published on November 21, 2025
TLS 1.2 Client Can Downgrade Digest Used
With TLS 1.2 connections a client can use any digest, specifically a weaker digest that is supported, rather than those in the CertificateRequest.
Vulnerability Analysis
CVE-2025-12889 can be exploited with network access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity and availability.
Weakness Type
Improper Input Validation
The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
Products Associated with CVE-2025-12889
stack.watch emails you whenever new vulnerabilities are published in Wolfssl or OpenSSL. Just hit a watch button to start following.
Affected Versions
wolfSSL:- Before 5.8.4 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.