CVE-2025-49113: RoundCube Webmail Deserialization of Untrusted Data Vulnerability
- Is it exploited?
Yes. CISA added it to the Known Exploited Vulnerabilities catalog on 20 Feb 2026, 263 days after the CVE record was published.
- How likely is exploitation in the next 30 days?
- 99.7%
EPSS score, percentile 100 of all scored records
- How severe?
- 9.9 Critical
CVSS v3.1 base score, given by the CNA
- What should I do?
CISA deadline 13 Mar 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.
The CVE record links no vendor advisory, patch or mitigation.
- Which versions are affected?
Affected
- before 1.5.10
- from 1.6.0 to before 1.6.11
Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.
What to do
Required action, set by CISA
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
CISA due date for this action: 13 March 2026.
Advisories and patches
The CVE record links no vendor advisory, patch or mitigation.
Linked from CISA's catalog entry
- https://roundcube.net/news/2025/06/01/security-updates-1.6.11-and-1.5.10
- https://github.com/roundcube/roundcubemail/releases/tag/1.5.10
- https://github.com/roundcube/roundcubemail/releases/tag/1.6.11
- https://nvd.nist.gov/vuln/detail/CVE-2025-49113
Affected products and versions
As listed in the CVE record.
| Status | Versions |
|---|---|
| Affected | before 1.5.10 |
| Affected | from 1.6.0 to before 1.6.11 |
Versions not listed are: unaffected.
Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.
About this vulnerability
RoundCube Webmail contains a deserialization of untrusted data vulnerability that allows remote code execution by authenticated users because the _from parameter in a URL is not validated in program/actions/settings/upload.php.
Summary: CISA's KEV catalog, as of 28 Oct 2026.
- CISA added CVE-2025-49113 to its Known Exploited Vulnerabilities (KEV) catalog on 20 Feb 2026.
- CISA's ransomware flag for this entry is "Unknown": no evidence of ransomware use in the catalog, which is not proof of none.
- The due date CISA sets for the required action is 13 Mar 2026.
- The CVE record was published on 2 Jun 2025, 263 days before it was added to KEV.
- The CVE record carries a CVSS v3.1 base score of 9.9 (Critical), given by its CNA.
- FIRST's EPSS model puts the probability of exploitation in the next 30 days at 99.7% (percentile 100), as of 28 Oct 2026.
- CISA's SSVC assessment in the CVE record: exploitation active, automatable no, technical impact total.
Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026. About the data.
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.
Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.
Weakness
- CWE-502: Deserialization of Untrusted Data
CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record and the KEV entry.
Timeline
| Date | Event |
|---|---|
| 2 Jun 2025 | CVE record published |
| 20 Feb 2026 | Added to CISA KEV |
| 21 Feb 2026 | CVE record last updated |
| 13 Mar 2026 | CISA due date for the required action |
References
- roundcube.net
- github.com
- github.com
- github.com
- github.com
- github.com
- github.com
- fearsoff.org
- vicarius.io
- vicarius.io
More exploited Roundcube vulnerabilities
- CVE-2025-68461: RoundCube Webmail Cross-site Scripting Vulnerability
- CVE-2024-42009: RoundCube Webmail Cross-Site Scripting Vulnerability
- CVE-2024-37383: RoundCube Webmail Cross-Site Scripting (XSS) Vulnerability
- CVE-2020-13965: Roundcube Webmail Cross-Site Scripting (XSS) Vulnerability
- CVE-2023-43770: Roundcube Webmail Persistent Cross-Site Scripting (XSS) Vulnerability
- CVE-2023-5631: Roundcube Webmail Persistent Cross-Site Scripting (XSS) Vulnerability