Improper Validation of Certificate with Host Mismatch Affecting org.apache.logging.log4j:log4j-core package, versions [,2.25.3)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-JAVA-ORGAPACHELOGGINGLOG4J-14532782
- published19 Dec 2025
- disclosed18 Dec 2025
- creditSamuli Leinonen
Introduced: 18 Dec 2025
CVE-2025-68161 (opens in a new tab)How to fix?
Upgrade org.apache.logging.log4j:log4j-core to version 2.25.3 or higher.
Overview
org.apache.logging.log4j:log4j-core is a logging library for Java.
Affected versions of this package are vulnerable to Improper Validation of Certificate with Host Mismatch due to the lack of TLS hostname verification in the SocketAppender component. An attacker can intercept or redirect log traffic by performing a man-in-the-middle attack if they are able to intercept or redirect network traffic between the client and the log receiver and can present a server certificate issued by a certification authority trusted by the configured trust store or the default Java trust store.
Workaround
This vulnerability can be mitigated by configuring the SocketAppender to use a private or restricted trust root to limit the set of trusted certificates.