Improper Certificate Validation Affecting github.com/jumpserver/koko package, versions <3.5.6>=3.6.0 <3.6.5
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-GOLANG-GITHUBCOMJUMPSERVERKOKO-11027919
- published28 Jul 2025
- disclosed12 Jun 2025
- creditjustlovediaodiao, songofhawk
Introduced: 12 Jun 2025
CVE-2023-42818 Â (opens in a new tab)How to fix?
Upgrade github.com/jumpserver/koko to version 3.5.6, 3.6.5 or higher.
Overview
Affected versions of this package are vulnerable to Improper Certificate Validation via a vulnerable LeeEirc\crypto dependency. An attacker can utilize a disclosed public key to attempt brute-force authentication against the SSH service.
Note: While the vulnerability exists in LeeEirc\crypto which is fork of x/crypto, it was discovered and reported for jumpserver in github.com/jumpserver/koko use by github.com/jumpserver/jumpserver