What products are affected by CVE-2025-49113?

CVE-2025-49113 affects Roundcube Webmail. Refer to the vendor advisory and NVD record for affected versions.

Is there a public exploit for CVE-2025-49113?

Yes. Public exploit code or proof-of-concept has been identified for CVE-2025-49113. This lowers the barrier for exploitation and increases the urgency of patching. Organizations should prioritize remediation immediately.

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

CVE-2025-49113 has an EPSS score of 90.5%, placing it in the 100th percentile. This means it has a 90.5% probability of being exploited in the next 30 days, higher than 100% of all known vulnerabilities. EPSS (Exploit Prediction Scoring System) is maintained by FIRST and uses real-world threat data to estimate exploitation likelihood.

Actively Exploited — CISA KEV

CVE-2025-49113: Roundcube Webmail Critical Vulnerability

Severity: Critical | CVSS 3.1: 9.9 | Published: 2025-06-02 | KEV Added: 2026-02-20

What is CVE-2025-49113?

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.

Technical Analysis

Weakness Classification

This vulnerability is classified as CWE-502 — Deserialization of Untrusted Data. The application deserializes untrusted data without sufficient validation, which can lead to remote code execution, denial of service, or other attacks.

Attack Vector Breakdown

Attack Vector: Network
Attack Complexity: Low
Privileges Required: Low
User Interaction: None
Scope: Changed
Confidentiality: High
Integrity: High
Availability: High

Impact Analysis

This vulnerability is exploitable over the network, meaning any system reachable via the internet or internal network is potentially at risk without physical access. The attack complexity is low, meaning exploitation does not depend on specialized conditions or race windows. Successful exploitation can result in full confidentiality breach (complete data disclosure), complete integrity compromise (data modification or code execution), total availability loss (denial of service). Notably, the vulnerability's scope is changed, meaning exploitation can affect resources beyond the vulnerable component — for example, escaping a sandbox or container to impact the host system. The application deserializes untrusted data without sufficient validation, which can lead to remote code execution, denial of service, or other attacks.

Exploitation Probability (EPSS): 90.5% chance of exploitation in the next 30 days (100th percentile). This places the vulnerability in the highest risk tier — immediate action is critical.

Exploit Availability

Public exploit code or proof-of-concept is available for CVE-2025-49113. This significantly increases the risk of exploitation, as attackers can use or adapt existing exploit code rather than developing their own. A public exploit reference has been identified. Organizations should treat this as an urgent patching priority.

Is CVE-2025-49113 being exploited?

Yes. CVE-2025-49113 is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, restricted to CVEs with confirmed active exploitation in the wild. CISA added this vulnerability on 2026-02-20. Inclusion in KEV triggers the patching mandate under BOD 22-01 for U.S. federal civilian agencies, with a remediation deadline of 2026-03-13. Additionally, public exploit code is available, which lowers the barrier for attackers.

How to fix CVE-2025-49113

Apply the security update issued by Roundcube for Webmail. If an immediate patch is not possible, consult the vendor advisory for mitigation guidance, restrict network exposure of the affected service, and monitor logs for indicators of exploitation. CISA's Known Exploited Vulnerabilities catalog requires U.S. federal agencies to remediate this vulnerability by the due date shown below under Binding Operational Directive 22-01. Private organizations should treat KEV entries as priority-one patches because active exploitation has been confirmed in the wild.

Related Vulnerabilities

Other actively exploited vulnerabilities affecting Webmail or sharing the same weakness (CWE-502):

CVE-2025-68461 (High 7.2) [same product] — Roundcube Webmail before 1.5.12 and 1.6 before 1.6.12 is prone to a…
CVE-2024-42009 (Unknown N/A) [same product] — RoundCube Webmail contains a cross-site scripting vulnerability. This…
CVE-2026-45247 (Critical 9.8) [same CWE] — Mirasvit Full Page Cache Warmer for Magento 2 before version 1.11.12 contains…
CVE-2023-21529 (High 8.8) [same CWE] — Microsoft Exchange Server Remote Code Execution Vulnerability
CVE-2026-20131 (Critical 10.0) [same CWE] — A vulnerability in the web-based management interface of Cisco Secure Firewall…

Frequently asked questions

Is CVE-2025-49113 critical?

CVE-2025-49113 has a CVSS 3.1 base score of 9.9 — Critical severity. It should be treated as a priority patch, especially given the active exploitation confirmed by CISA. The availability of public exploit code further increases the urgency.

Is CVE-2025-49113 being actively exploited?

Yes — CISA added CVE-2025-49113 to the Known Exploited Vulnerabilities catalog on 2026-02-20. Inclusion in KEV means CISA has confirmed in-the-wild exploitation. Public exploit code has also been identified, making exploitation accessible to a broader range of threat actors.

How do I patch CVE-2025-49113?

Apply the security update from Roundcube for Webmail. Federal agencies must remediate by 2026-03-13 under BOD 22-01.

What type of vulnerability is CVE-2025-49113?

CVE-2025-49113 is classified under CWE-502 (Deserialization of Untrusted Data). The application deserializes untrusted data without sufficient validation, which can lead to remote code execution, denial of service, or other attacks.

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

CVE-2025-49113 has a CVSS 3.1 base score of 9.9, classifying it as Critical severity. The attack vector is Network, attack complexity is Low, and non-zero privileges are required.