CVE-2025-31129 jooby-pac4j: deserialization of untrusted data
Attackers can execute arbitrary code by sending malicious serialized data to the Jooby web framework's pac4j session store.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2025-31129?
CVE-2025-31129 is a high-severity unsafe deserialization vulnerability in jooby-project jooby, published on 31 Mar 2025. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Jooby is a web framework for Java and Kotlin. The pac4j io.jooby.internal.pac4j.SessionStoreImpl#get module deserializes untrusted data. This vulnerability is fixed in 2.17.0 (2.x) and 3.7.0 (3.x).
Weakness: CWE-502
Which versions are affected by CVE-2025-31129?
4 open source packages ship an affected version, including io.jooby:jooby-pac4j.
| Package | Affected | Fixed in |
|---|---|---|
io.jooby:jooby-pac4j Maven | All versions | 2.17.0 |
io.jooby:jooby-pac4j Maven | All versions | 2.17.0 |
io.jooby:jooby-pac4j Maven | From 3.0.0.M1 | 3.7.0 |
io.jooby:jooby-pac4j Maven | From 3.0.0.M1 | 3.7.0 |
How do I fix CVE-2025-31129?
Upgrade io.jooby:jooby-pac4j to a fixed version for your release line: 2.17.0 or 3.7.0.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2025-31129 being exploited?
There is no known exploitation of CVE-2025-31129 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as GHSA-7c5v-895v-w4q5.