Roundcube Webmail — CraftedSignal Threat Feedhttps://feed.craftedsignal.io/products/roundcube-webmail/Trending threats, MITRE ATT&CK coverage, and detection metadata. Fed continuously.Hugoenhello@craftedsignal.iohello@craftedsignal.ioTue, 26 May 2026 11:35:03 +0000Multiple Vulnerabilities in Roundcube Webmailhttps://feed.craftedsignal.io/briefs/2026-05-roundcube-vulns/Tue, 26 May 2026 11:35:03 +0000hello@craftedsignal.iohttps://feed.craftedsignal.io/briefs/2026-05-roundcube-vulns/Multiple vulnerabilities in Roundcube Webmail allow an attacker to perform SQL injection attacks, bypass security measures, manipulate data, disclose confidential information, obtain extended privileges, execute arbitrary code, or perform cross-site scripting attacks.Multiple vulnerabilities have been identified in Roundcube Webmail that could be exploited by an attacker. These vulnerabilities, if successfully exploited, could lead to a range of malicious activities, including SQL injection attacks, bypassing security measures, data manipulation, disclosure of sensitive information, gaining elevated privileges, arbitrary code execution, or performing Cross-Site Scripting (XSS) attacks. Successful exploitation of these vulnerabilities could severely compromise the confidentiality, integrity, and availability of the affected Roundcube Webmail installation and the data it handles. Defenders should apply the latest patches immediately.

Attack Chain

  1. Attacker identifies a vulnerable Roundcube Webmail instance.
  2. Attacker crafts a malicious request targeting a SQL injection vulnerability.
  3. The malicious SQL query is injected into the Roundcube Webmail application.
  4. The database executes the malicious SQL query, allowing the attacker to read, modify, or delete data.
  5. Alternatively, the attacker injects malicious JavaScript code via an XSS vulnerability.
  6. The injected JavaScript code executes in the context of a user’s browser when they access a page containing the injected code.
  7. The attacker uses the XSS vulnerability to steal user credentials or session tokens.
  8. The attacker uses stolen credentials or tokens to gain unauthorized access to the Roundcube Webmail account and potentially the underlying server.

Impact

Successful exploitation of these vulnerabilities could lead to significant data breaches, unauthorized access to sensitive information, and the complete compromise of the Roundcube Webmail installation. Attackers could gain control of user accounts, steal confidential emails, and potentially use the compromised server as a launchpad for further attacks. The lack of specific victim count or sector targeting in the advisory suggests a broad potential impact across various organizations using Roundcube Webmail.

Recommendation

  • Upgrade Roundcube Webmail to the latest version to patch the vulnerabilities described in the advisory.
  • Deploy the Sigma rule Detect Roundcube Webmail SQL Injection Attempts to your SIEM to identify potential SQL injection attempts targeting Roundcube Webmail.
  • Deploy the Sigma rule Detect Roundcube Webmail XSS Attacks to detect XSS attacks.
  • Regularly review and update security measures for Roundcube Webmail and the underlying server infrastructure.
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