How severe is CVE-2025-49113?

CVE-2025-49113 has a CVSS score of 8.8/10, rated HIGH. Immediate patching is strongly recommended.

Which packages are affected by CVE-2025-49113?

CVE-2025-49113 affects the following packages: roundcube/roundcubemail (Packagist), roundcube/roundcubemail (Packagist). Ecosystems affected: Packagist.

How do I fix CVE-2025-49113?

Update roundcube/roundcubemail to version 1.5.10 or later. Run your dependency manager's update command and verify no transitive dependencies pin the vulnerable version. Use O3 Security's SCA scanner to confirm the fix is applied across your entire dependency tree.

Is CVE-2025-49113 actively exploited in the wild?

Yes. There are 9 known exploit references for CVE-2025-49113, including 1 documented proof-of-concept exploit on Exploit-DB. Treat this as actively exploitable and prioritize patching immediately. All exploit code should only be run in an isolated sandbox environment for research or authorized testing — never against production systems without explicit written authorization.

What is the EPSS score for CVE-2025-49113?

CVE-2025-49113 has an EPSS (Exploit Prediction Scoring System) score of 90.5%, placing it in the 100th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. A score above 50% indicates significantly elevated exploitation risk — immediate patching is strongly recommended.

Is CVE-2025-49113 in the CISA Known Exploited Vulnerabilities catalog?

Yes. CVE-2025-49113 (RoundCube Webmail Deserialization of Untrusted Data Vulnerability) was added to CISA's Known Exploited Vulnerabilities (KEV) catalog on 2026-02-20. CISA required all US federal civilian agencies to remediate this vulnerability by 2026-03-13. The required action was: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. Being listed in the KEV catalog is the strongest possible confirmation of active exploitation — treat this as a critical priority.

What type of vulnerability is CVE-2025-49113?

CVE-2025-49113 is classified as Deserialization of Untrusted Data (CWE-502). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation. This is a high-impact weakness class that often enables remote code execution or data exposure.

Is there exploit tooling available for CVE-2025-49113?

A Nuclei detection template exists for CVE-2025-49113, meaning automated scanners can fingerprint it. Public exploit tooling significantly increases real-world risk — prioritize patching and ensure detection coverage. Exploit tooling should only ever be used in isolated, authorized testing environments.

When was CVE-2025-49113 published, and has it been updated?

CVE-2025-49113 was published on June 2, 2025 and was last updated on April 16, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

CISA KEV·Added 2026-02-20 — agencies required to remediate by 2026-03-13

🐘 Packagist

CVE-2025-49113

HIGH

Roundcube Webmail Vulnerable to Authenticated RCE via PHP Object Deserialization

Also known asGHSA-8j8w-wwqc-x596

Published

Jun 2, 2025

Updated

Apr 16, 2026

Affected

2 pkgs

Patched

2 / 2

Exploits

9 known

EPSS Exploitation Probability

via FIRST.org ↗

90.5%probability of exploitation in next 30 days

Very High Risk100th percentile0.00%

EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.

Blast Radius

2 pkgs affected

🐘roundcube/roundcubemail🐘roundcube/roundcubemail

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.

Description

Roundcube Webmail before 1.5.10 and 1.6.x before 1.6.11 allows remote code execution by authenticated users because the _from parameter in a URL is not validated in program/actions/settings/upload.php, leading to PHP Object Deserialization.

Affected Packages

2 total 2 fixed

Ecosystem	Package	Vulnerable range	Fix
🐘Packagist	`roundcube/roundcubemail`	all versions	1.5.10
🐘Packagist	`roundcube/roundcubemail`	≥ 1.6.0&&< 1.6.11	1.6.11

Exploits & PoCs

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

EDB-52324webappsmultiple

Roundcube 1.6.10 - Remote Code Execution (RCE)

by Maksim Rogov · Jun 13, 2025

Exploit-DB Source

Frequently Asked Questions

O3 Security · Impact-Aware SCA

Is CVE-2025-49113 in your stack?

O3 detects CVE-2025-49113 across Packagist dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.

Scan my stack How O3 SCA works

CVSS Score

8.8/10

CVSS v3 base score

Vector breakdown

AV:Attack Vector

Network

AC:Attack Complexity

Low

PR:Privileges Required

Low

UI:User Interaction