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Roundcube remediated CVE-2025-49113, a serious vulnerability that allows an authenticated attacker to execute arbitrary code remotely on affected Roundcube Webmail servers. Successful exploitation could enable exposure of sensitive data and compromise of the mail environment.
The Dutch National Cyber Security Centre reported that public exploit code is circulating, raising the likelihood of abuse, and rated both likelihood and impact as High. Organizations running the 1.6.x branch should upgrade to 1.6.11, while those using the 1.5.x LTS branch should upgrade to 1.5.10 as soon as possible.
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2 events from the most recent confirmed update back to the earliest known activity.
The Dutch NCSC received indications that exploit code for CVE-2025-49113 was circulating publicly, increasing the likelihood of exploitation. The NCSC assessed both the likelihood and potential impact as High.
Roundcube released security updates remediating CVE-2025-49113, an authenticated remote code execution vulnerability in Roundcube Webmail. The fixes are available in versions 1.6.11 and 1.5.10 for the respective supported branches.
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Roundcube released security updates **1.6.11** and **1.5.10** to fix **CVE-2025-49113**, a critical post-authentication remote code execution flaw in its open-source webmail platform. The vulnerability affects versions earlier than **1.6.11** and the LTS branch earlier than **1.5.10**, and stems from improper sanitization of the `_from` parameter in `/program/actions/settings/upload.php`, which can lead to **PHP object deserialization** and arbitrary code execution. Researchers and national defenders reported that the flaw is being **actively exploited** and that public analysis of the June hotfix helped attackers develop working exploits. FearsOff published technical research and proof-of-concept details, while CSIRT.SK said exploit code is being sold on hacker forums and warned that attackers may obtain the required authenticated access through phishing, brute-force, or CSRF. Administrators were urged to upgrade immediately and review Roundcube, network, and security logs for signs of compromise.
Jul 24, 2026
Roundcube Webmail released urgent security updates to fix multiple high-risk vulnerabilities across supported branches, including versions **1.6.16** and **1.7.1**, following earlier fixes in **1.6.14** for the 1.6.x line. The newly disclosed issues include **CVE-2026-48842**, a pre-authentication SQL injection flaw in the `virtuser_query` plugin with a CVSS score of **8.1**, and **CVE-2026-48844**, a code injection bug tied to direct code evaluation in LDAP autovalues configuration that could enable arbitrary command execution. Additional patches address XSS, session poisoning, arbitrary file deletion, and SSRF bypass vulnerabilities tracked as **CVE-2026-48845** through **CVE-2026-48849**, and a dCERT advisory also lists Roundcube as affected by multiple vulnerabilities. Earlier Roundcube fixes had already addressed a separate set of severe weaknesses, including a pre-authentication arbitrary file write issue in Redis and Memcached session handlers that could lead to unauthenticated remote code execution and full server compromise, along with account takeover, SSRF, IMAP injection, CSRF bypass, and HTML attachment preview XSS. Researchers credited across the disclosures include **y0us**, **Georgios Tsimpidas**, **flydragon777**, the **Martila Security Research Team**, **aikido_security**, and **nullcathedral**. Roundcube described the releases as stable and urged administrators to back up systems and deploy updates quickly to protect exposed email infrastructure from pre-authentication exploitation.
Jun 29, 2026
Roundcube Webmail has released urgent security updates to address two critical vulnerabilities affecting versions 1.6 and 1.5 LTS. The first flaw is a Cross-Site Scripting (XSS) vulnerability in the SVG handling mechanism, which allows attackers to inject and execute arbitrary JavaScript code via the `animate` tag, potentially leading to the theft of session tokens, credentials, and sensitive email data. The second vulnerability is an information disclosure issue in the HTML style sanitizer, enabling attackers to bypass sanitization filters and access confidential information through specially crafted HTML content. Both vulnerabilities were reported by independent security researchers and pose significant risks to user privacy and data security. Roundcube has released patched versions 1.6.12 and 1.5.12 to mitigate these threats and strongly recommends immediate updates for all affected installations. System administrators are urged to verify their current Roundcube version and apply the updates without delay, as exploitation in the wild is possible. The security community highlights the importance of prompt patching to prevent unauthorized access and information leakage in webmail environments.
Jun 29, 2026