CVE-2025-2251 – This vulnerability allows remote code execution... (How to Fix)

Q: What is the severity of CVE-2025-2251?

CVE-2025-2251 has a CVSS score of 6.2 (MEDIUM). This vulnerability allows remote code execution on WildFly and JBoss EAP servers through untrusted deserialization in the EJB remote invocation mechanism. Attackers can exploit this without authentication by sending specially crafted serialized objects. Organizations using affected versions of WildFly or JBoss EAP are at risk.

📋 TL;DR

This vulnerability allows remote code execution on WildFly and JBoss EAP servers through untrusted deserialization in the EJB remote invocation mechanism. Attackers can exploit this without authentication by sending specially crafted serialized objects. Organizations using affected versions of WildFly or JBoss EAP are at risk.

💻 Affected Systems

Products:

WildFly
JBoss Enterprise Application Platform (EAP)

Versions: Specific versions listed in Red Hat advisories (check references for exact ranges)

Operating Systems: All platforms running affected WildFly/JBoss versions

Default Config Vulnerable: ⚠️ Yes

Notes: Affects EJB remote invocation functionality using JBoss Marshalling

⚠️ Manual Verification Required

This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.

Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).

🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.

Recommended Actions:

Review the CVE details at NVD
Check vendor security advisories for your specific version
Test if the vulnerability is exploitable in your environment
Consider updating to the latest version as a precaution

⚠️ Risk & Real-World Impact

🔴

Worst Case

Full system compromise leading to data theft, lateral movement, and persistent backdoor installation

🟠

Likely Case

Remote code execution allowing attacker to run arbitrary commands with application server privileges

🟢

If Mitigated

Limited impact if proper network segmentation and access controls prevent exploitation attempts

🌐 Internet-Facing: HIGH - Unauthenticated remote exploitation makes internet-facing servers prime targets

🏢 Internal Only: MEDIUM - Internal attackers or compromised systems could exploit this for lateral movement

🎯 Exploit Status

Public PoC: ✅ No

Weaponized: UNKNOWN

Unauthenticated Exploit: ⚠️ Yes

Complexity: LOW

Unauthenticated exploitation lowers barrier for attackers; weaponization likely given RCE nature

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: Check Red Hat advisories for specific patched versions

Vendor Advisory: https://access.redhat.com/errata/RHSA-2025:10452

Restart Required: Yes

Instructions:

1. Review Red Hat advisories for exact affected versions. 2. Apply security updates from official Red Hat repositories. 3. Restart WildFly/JBoss services after patching. 4. Verify patch application.

🔧 Temporary Workarounds

Disable EJB Remote Invocation

all

Disable vulnerable EJB remote invocation endpoints if not required

Configure application server to disable EJB remote access

Network Access Controls

linux

Restrict network access to EJB ports (typically 4447, 8080, 8443)

iptables -A INPUT -p tcp --dport 4447 -j DROP
firewall-cmd --permanent --remove-port=4447/tcp

🧯 If You Can't Patch

Implement strict network segmentation to isolate vulnerable servers
Deploy web application firewall (WAF) with deserialization attack detection rules

🔍 How to Verify

Check if Vulnerable:

Check WildFly/JBoss version against Red Hat advisories; examine if EJB remote invocation is enabled

Check Version:

jboss-cli.sh --connect --command="version" or check server logs for version information

Verify Fix Applied:

Verify version is updated to patched release; test EJB functionality remains operational

📡 Detection & Monitoring

Log Indicators:

Unusual deserialization errors in server logs
Suspicious EJB remote invocation patterns

Network Indicators:

Unusual traffic to EJB ports (4447)
Malformed serialized objects in network traffic

SIEM Query:

source="wildfly.log" AND ("deserialization" OR "EJB" OR "marshalling") AND severity=ERROR

📊 Metadata

CVE ID: CVE-2025-2251

CVSS v3 Score: 6.2 (MEDIUM)

CVSS Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:H/A:H

CWE: CWE-502

EPSS Score: 3.84% exploit probability (87.9th percentile)

Published: April 7, 2025

Last Updated: July 14, 2025

🔗 References

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