{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata — refreshed continuously.","feed_url":"https://feed.craftedsignal.io/tags/roundcube/","home_page_url":"https://feed.craftedsignal.io/","items":[{"_cs_actors":[],"_cs_cves":[],"_cs_exploited":false,"_cs_products":[],"_cs_severities":["high"],"_cs_tags":["roundcube","vulnerability","xss","file-manipulation"],"_cs_type":"advisory","_cs_vendors":[],"content_html":"\u003cp\u003eRoundcube is a widely used, open-source webmail solution. The BSI advisory highlights multiple vulnerabilities within Roundcube that can be exploited by an attacker. These vulnerabilities allow for file manipulation, security bypass, cross-site scripting (XSS) attacks, and information disclosure. While the specific versions affected are not detailed, administrators are urged to investigate and apply necessary patches. Successful exploitation could lead to unauthorized access to sensitive email data, compromise of user accounts, and potential further attacks within the affected infrastructure. The advisory was published on 2026-04-21, emphasizing the timeliness of the threat.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eThe attacker identifies a vulnerable Roundcube instance through scanning or reconnaissance.\u003c/li\u003e\n\u003cli\u003eThe attacker leverages a file manipulation vulnerability to upload a malicious file (e.g., a PHP script) to a Roundcube-accessible directory.\u003c/li\u003e\n\u003cli\u003eThe attacker bypasses security measures implemented within Roundcube to prevent unauthorized file access or execution.\u003c/li\u003e\n\u003cli\u003eThe attacker exploits a cross-site scripting (XSS) vulnerability by injecting malicious JavaScript code into a Roundcube page.\u003c/li\u003e\n\u003cli\u003eA legitimate user accesses the compromised page, triggering the injected JavaScript.\u003c/li\u003e\n\u003cli\u003eThe malicious JavaScript executes in the user\u0026rsquo;s browser, potentially stealing cookies or redirecting the user to a phishing site.\u003c/li\u003e\n\u003cli\u003eThe attacker exploits an information disclosure vulnerability to gain access to sensitive information such as user credentials or internal system details.\u003c/li\u003e\n\u003cli\u003eUsing the gathered information, the attacker elevates privileges or gains unauthorized access to other systems.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eSuccessful exploitation of these Roundcube vulnerabilities could lead to a range of damaging outcomes. Attackers could gain unauthorized access to sensitive email communications, potentially exposing confidential business information or personal data. Compromised user accounts could be used for further attacks, such as sending phishing emails or gaining access to other internal systems. XSS attacks could lead to credential theft and account takeover. Information disclosure could reveal sensitive system details, aiding in further exploitation. The number of affected organizations is currently unknown, but any organization using a vulnerable Roundcube instance is at risk.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eInspect Roundcube webserver logs for suspicious file uploads and access attempts, focusing on unusual file extensions or directory traversals. Use the \u003ccode\u003eRoundcube File Upload\u003c/code\u003e Sigma rule as a starting point.\u003c/li\u003e\n\u003cli\u003eImplement a Web Application Firewall (WAF) to filter malicious requests and prevent XSS attacks.\u003c/li\u003e\n\u003cli\u003eMonitor Roundcube logs for unusual activity, such as unexpected access to sensitive files or directories.\u003c/li\u003e\n\u003cli\u003eReview and harden Roundcube\u0026rsquo;s security configuration, including disabling unnecessary features and enforcing strong password policies.\u003c/li\u003e\n\u003cli\u003eDeploy the \u003ccode\u003eRoundcube XSS Attempt\u003c/code\u003e Sigma rule to detect potential cross-site scripting attacks targeting Roundcube.\u003c/li\u003e\n\u003cli\u003eEnable verbose logging for the web server hosting Roundcube to capture detailed information about requests and responses.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2026-04-21T08:06:54Z","date_published":"2026-04-21T08:06:54Z","id":"/briefs/2026-04-roundcube-vulns/","summary":"Multiple vulnerabilities in Roundcube allow an attacker to manipulate files, bypass security measures, perform cross-site scripting attacks, and disclose information.","title":"Multiple Vulnerabilities in Roundcube","url":"https://feed.craftedsignal.io/briefs/2026-04-roundcube-vulns/"},{"_cs_actors":[],"_cs_cves":[{"cvss":6.1,"id":"CVE-2024-37383"},{"cvss":6.1,"id":"CVE-2024-37384"},{"cvss":9.8,"id":"CVE-2024-37385"}],"_cs_exploited":false,"_cs_products":["Roundcube"],"_cs_severities":["medium"],"_cs_tags":["roundcube","xss","vulnerability"],"_cs_type":"advisory","_cs_vendors":["Roundcube"],"content_html":"\u003cp\u003eMultiple vulnerabilities have been identified in Roundcube, a widely used webmail solution. An attacker exploiting these vulnerabilities can perform cross-site scripting (XSS) attacks, potentially leading to the disclosure of sensitive information. This poses a significant risk to organizations relying on Roundcube for email communication, as successful exploitation could compromise user accounts, expose confidential emails, and enable further malicious activities within the affected environment. The CERT-Bund advisory WID-SEC-2024-1754 highlights the risk, emphasizing the need for immediate mitigation measures.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eThe attacker identifies a vulnerable Roundcube instance.\u003c/li\u003e\n\u003cli\u003eThe attacker crafts a malicious payload containing XSS code.\u003c/li\u003e\n\u003cli\u003eThe attacker injects the payload into a Roundcube page, possibly through a crafted email or a vulnerable input field.\u003c/li\u003e\n\u003cli\u003eA legitimate user accesses the compromised page.\u003c/li\u003e\n\u003cli\u003eThe victim\u0026rsquo;s browser executes the attacker\u0026rsquo;s XSS code.\u003c/li\u003e\n\u003cli\u003eThe attacker\u0026rsquo;s script steals the victim\u0026rsquo;s session cookies or other sensitive data.\u003c/li\u003e\n\u003cli\u003eThe attacker uses the stolen credentials to impersonate the victim and access their email account.\u003c/li\u003e\n\u003cli\u003eThe attacker exfiltrates confidential information or performs further malicious actions, such as sending phishing emails to other users.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eSuccessful exploitation of these Roundcube vulnerabilities can lead to severe consequences. An attacker could gain unauthorized access to user email accounts, steal sensitive information, and conduct further malicious activities, like phishing or data breaches. The impact includes potential financial losses, reputational damage, and legal liabilities due to compromised data. The number of affected users and organizations depends on the scale of Roundcube deployments, but the potential impact is substantial.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eDeploy the Sigma rule \u003ccode\u003eDetect Suspicious Roundcube URI Activity\u003c/code\u003e to identify potential exploitation attempts in web server logs.\u003c/li\u003e\n\u003cli\u003eReview Roundcube configuration and apply security best practices to minimize the attack surface.\u003c/li\u003e\n\u003cli\u003eImplement input validation and output encoding to prevent XSS attacks.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2024-06-24T10:00:00Z","date_published":"2024-06-24T10:00:00Z","id":"/briefs/2024-06-roundcube-xss/","summary":"Multiple vulnerabilities in Roundcube allow an attacker to perform a cross-site scripting attack and disclose confidential information.","title":"Roundcube Vulnerabilities Leading to Cross-Site Scripting and Information Disclosure","url":"https://feed.craftedsignal.io/briefs/2024-06-roundcube-xss/"}],"language":"en","title":"CraftedSignal Threat Feed — Roundcube","version":"https://jsonfeed.org/version/1.1"}