Roundcube Webmail up to 1.5.9/1.6.10 upload.php _from deserialization

Summaryinfo

A vulnerability, which was classified as critical, has been found in Roundcube Webmail up to 1.5.9/1.6.10. This issue affects some unknown processing of the file program/actions/settings/upload.php. The manipulation of the argument _from leads to deserialization. This vulnerability is uniquely identified as CVE-2025-49113. The attack is possible to be carried out remotely. Moreover, an exploit is present. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Roundcube Webmail up to 1.5.9/1.6.10. It has been rated as critical. This issue affects an unknown functionality of the file program/actions/settings/upload.php. The manipulation of the argument _from with an unknown input leads to a deserialization vulnerability. Using CWE to declare the problem leads to CWE-502. The product deserializes untrusted data without sufficiently verifying that the resulting data will be valid. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

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.

It is possible to read the advisory at roundcube.net. The identification of this vulnerability is CVE-2025-49113 since 06/02/2025. The exploitation is known to be easy. The attack may be initiated remotely. Technical details as well as a public exploit are known.

The exploit is available at exploit-db.com. It is declared as attacked. By approaching the search of inurl:program/actions/settings/upload.php it is possible to find vulnerable targets with Google Hacking. The vulnerability scanner Nessus provides a plugin with the ID 237664 (Debian dsa-5934 : roundcube - security update), which helps to determine the existence of the flaw in a target environment. The CISA Known Exploited Vulnerabilities Catalog lists this issue since 02/20/2026 with a due date of 03/13/2026:

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Upgrading to version 1.5.10 or 1.6.11 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch 0376f69e958a8fef7f6f09e352c541b4e7729c4d is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Exploit-DB (52324), Tenable (237664) and EUVD (EUVD-2025-16605). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• Mail Client Software

Vendor

• Roundcube

Name

• Webmail

Version

• 1.5.0
• 1.5.1
• 1.5.2
• 1.5.3
• 1.5.4
• 1.5.5
• 1.5.6
• 1.5.7
• 1.5.8
• 1.5.9
• 1.6.0
• 1.6.1
• 1.6.2
• 1.6.3
• 1.6.4
• 1.6.5
• 1.6.6
• 1.6.7
• 1.6.8
• 1.6.9
• 1.6.10

License

• free

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

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Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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