{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata. Fed continuously.","feed_url":"https://feed.craftedsignal.io/products/zimbra-collaboration--10.1.19/feed.json","home_page_url":"https://feed.craftedsignal.io/","items":[{"_cs_actors":[],"_cs_cpes":[],"_cs_cves":[],"_cs_exploited":true,"_cs_has_poc":false,"_cs_poc_references":[],"_cs_products":["Zimbra Collaboration \u003c 10.1.19"],"_cs_severities":["high"],"_cs_tags":["xss","web-application","vulnerability","zimbra","mail-server"],"_cs_type":"threat","_cs_vendors":["Synacor"],"content_html":"\u003cp\u003eThe French National Cybersecurity Agency (ANSSI) CERT-FR issued an advisory on July 7, 2026, regarding a critical vulnerability identified in Synacor Zimbra Collaboration. This flaw, classified as an indirect remote code injection via Cross-Site Scripting (XSS), affects all versions of Zimbra Collaboration preceding 10.1.19. An attacker could exploit this vulnerability to execute malicious scripts in a victim's web browser, which might lead to unauthorized access to user sessions, data theft, or website defacement. While the advisory does not detail specific observed exploitation in the wild, the nature of XSS in a widely used collaboration platform like Zimbra presents a significant risk to user data and system integrity if left unpatched. Organizations using vulnerable versions are urged to apply the recommended security updates immediately.\u003c/p\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eA successful exploitation of this XSS vulnerability could allow an attacker to execute arbitrary script code in the context of a victim's browser session. This could lead to a range of severe consequences, including session hijacking, enabling the attacker to impersonate the user and access their email, contacts, and calendar. Attackers might also leverage the compromised session to exfiltrate sensitive data, redirect users to malicious websites, or deface the web interface. The absence of immediate patching can result in significant data breaches, reputational damage, and disruption to business operations for affected organizations.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eUpdate Synacor Zimbra Collaboration to version 10.1.19 or later immediately to patch the identified XSS vulnerability, as specified in the Synacor bulletin referenced in this brief.\u003c/li\u003e\n\u003cli\u003eEnsure regular patching cycles are in place for all internet-facing web applications, especially collaboration platforms like Zimbra Collaboration.\u003c/li\u003e\n\u003cli\u003eImplement Content Security Policy (CSP) headers as a defense-in-depth measure against XSS attacks, configured to restrict script sources.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2026-07-07T13:58:05Z","date_published":"2026-07-07T13:58:05Z","id":"https://feed.craftedsignal.io/briefs/2026-07-zimbra-xss-vulnerability/","summary":"A critical cross-site scripting (XSS) vulnerability, affecting Synacor Zimbra Collaboration versions prior to 10.1.19, allows an attacker to achieve remote indirect code injection, potentially leading to session hijacking, data exfiltration, or defacement.","title":"Critical XSS Vulnerability in Synacor Zimbra Collaboration","url":"https://feed.craftedsignal.io/briefs/2026-07-zimbra-xss-vulnerability/"}],"language":"en","title":"CraftedSignal Threat Feed - Zimbra Collaboration \u003c 10.1.19","version":"https://jsonfeed.org/version/1.1"}