pac4j-core affected by a Java deserialization vulnerability
pac4j is a security framework for Java. pac4j-core prior to version 4.0.0 is affected by a Java deserialization vulnerability. The vulnerability affects systems that store externally controlled values in attributes of the UserProfile class from pac4j-core. It can be exploited by providing an attribute that contains a serialized Java object with a special prefix {#sb64} and Base64 encoding. This issue may lead to Remote Code Execution (RCE) in the worst case. Although a RestrictedObjectInputStream is in place, that puts some restriction on what classes can be deserialized, it still allows a broad range of java packages and potentially exploitable with different gadget chains. pac4j versions 4.0.0 and greater are not affected by this issue. Users are advised to upgrade. There are no known workarounds for this vulnerability.
Software afectado
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| Plataforma | Paquete | Versiones vulnerables | Corregida en |
|---|---|---|---|
| Java / Kotlin (Maven) | org.pac4j:pac4j-core | < 4.0.0 | 4.0.0 |
Referencias
- https://nvd.nist.gov/vuln/detail/CVE-2023-25581
- https://github.com/frohoff/ysoserial
- https://github.com/pac4j/pac4j
- https://github.com/pac4j/pac4j/blob/5834aeb22ad3a4369dfa572be60d7b20f5784a8f/pac4j-core/src/main/java/org/pac4j/core/profile/InternalAttributeHandler.java#L95
- https://portswigger.net/web-security/deserialization
- https://securitylab.github.com/advisories
- https://securitylab.github.com/advisories/GHSL-2022-085_pac4j
- Vector CVSS
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H- Debilidad (CWE)
CWE-502- Plataforma
- Java / Kotlin (Maven)
- Paquete
org.pac4j:pac4j-core- Publicada
- 11.10.2024
- Actualizado
- 11.10.2026 12:21
Fuentes y licencias
OSV / GitHub Advisory Database - GHSA-76mw-6p95-x9x5 - CC BY 4.0
Historial de vulnerabilidades: org.pac4j:pac4j-core
Todas las vulnerabilidades publicadas de este paquete (Java / Kotlin (Maven)), de la más reciente a la más antigua. Muestra si es un fallo aislado o un paquete que hay que vigilar.
- Entradas en total
- 2
- Primera → última
- 10.2024 04.2026
- Sin corrección
- 0
- Explotada en ataques
- 0
Distribución por gravedad
- Crítica 1
- Alta 1
Divulgaciones por año
- 2024: 1
- 2025: 0
- 2026: 1
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pac4j-core affected by a Java deserialization vulnerability esta entrada
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