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Advisory record · GHSA-76mw-6p95-x9x5

pac4j-core affected by a Java deserialization vulnerability

CVSS 9.2 CriticalCriticalEPSS 0.019 · 80th percentile

Critical, because:

  • CVSS score 9.2: 9.0 or more.

How we decide what’s critical

Published by the GitHub Advisory Database at 11 Oct 2024, 22:16 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
org.pac4j:pac4j-coreMaven<4.0.04.0.0
Identifiers
GHSA-76mw-6p95-x9x5 · CVE-2023-25581
Weakness (CWE)
CWE-502
Tags
Published
11 Oct 2024
Updated
14 Oct 2024

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

pac4j-core versions prior to 4.0.0 are affected by a Java deserialization vulnerability. Systems that store externally controlled values in UserProfile attributes are at risk, since an attacker can supply a specially prefixed, Base64-encoded serialized Java object that may lead to remote code execution. Upgrade to pac4j-core 4.0.0 or later; the source lists no workarounds.

Written 8 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
9.2 Critical 4.0 CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.019, the 80th percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 15:13 UTC First seen by agentprime
  2. 31 Oct 2026, 15:13 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.