CVE-2025-2251Network attack vector

Unauthenticated code execution via EJB object deserialization

Published Apr 7, 2025 · Updated Aug 19, 2026

Deserialization in Red Hat WildFly and JBoss EAP remote EJB invocation allows remote attackers to execute code with a crafted object. The server passes attacker-supplied serialized data to JBoss Marshalling with an incomplete FilterSpecClassResolverFilter denylist, allowing gadget classes to trigger a JNDI lookup. An exposed remote EJB endpoint is required, and successful gadget-chain execution runs code in the application server's security context.

CVSS severity6.2
Medium
EPSS probability1.05%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Deserialization in Red Hat WildFly and JBoss EAP remote EJB invocation allows remote attackers to execute code with a crafted object. The server passes attacker-supplied serialized data to JBoss Marshalling with an incomplete FilterSpecClassResolverFilter denylist, allowing gadget classes to trigger a JNDI lookup. An exposed remote EJB endpoint is required, and successful gadget-chain execution runs code in the application server's security context.

The record

CVE
CVE-2025-2251
Published
Apr 7, 2025
Updated
Aug 19, 2026
Vendor
389 Directory Server
Product
Red Hat JBoss Enterprise Application Platform 8
Classifications
CWE-502, CAPEC-586, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 7, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 19, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

389 Directory Server · Red Hat JBoss Enterprise Application Platform 8Affected versions are unavailable in this record.
389 Directory Server · WildFlyversion=0 <36.0.0
389 Directory Server · Red Hat JBoss Enterprise Application Platform 7Affected versions are unavailable in this record.

Published CVSS scores

6.2Red HatCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-502Deserialization of Untrusted Data
CAPEC-586Object Injection
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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