{"basis":"claimed","id":"CVE-2022-24682","name":"Synacor Zimbra Collaborate Suite (ZCS) Cross-Site Scripting Vulnerability","vendorProject":"Synacor","product":"Zimbra Collaborate Suite (ZCS)","publishedAt":"2022-02-09","cvss":{"score":6.1,"severity":"MEDIUM","version":"3.1"},"exploited":{"kevAdded":"2022-02-25","dueDate":"2022-03-11","ransomware":true},"epss":{"score":0.30931,"percentile":0.98259,"date":"2026-11-02"},"coverage":{"cloudflare":{"status":"no_history","firstOn":null,"daysToRule":null},"aws":{"status":"none","firstOn":null,"daysToRule":null},"azure":{"status":"none","firstOn":null,"daysToRule":null},"google":{"status":"no_history","firstOn":null,"daysToRule":null},"fastly":{"status":"no_history","firstOn":null,"daysToRule":null},"f5":{"status":"no_history","firstOn":null,"daysToRule":null},"akamai":{"status":"no_source","firstOn":null,"daysToRule":null},"crs":{"status":"no_history","firstOn":null,"daysToRule":null}},"title":null,"description":"An issue was discovered in the Calendar feature in Zimbra Collaboration Suite 8.8.x before 8.8.15 patch 30 (update 1), as exploited in the wild starting in December 2021. An attacker could place HTML containing executable JavaScript inside element attributes. This markup becomes unescaped, causing arbitrary markup to be injected into the document.","cwes":["CWE-79","CWE-116"],"vendors":[{"vendor":"cloudflare","status":"no_history","basis":"claimed","firstOn":null,"firstIsNew":false,"daysToRule":null,"daysAtMost":null,"freePlan":false,"claims":[]},{"vendor":"aws","status":"none","basis":"claimed","firstOn":null,"firstIsNew":false,"daysToRule":null,"daysAtMost":null,"freePlan":false,"claims":[]},{"vendor":"azure","status":"none","basis":"claimed","firstOn":null,"firstIsNew":false,"daysToRule":null,"daysAtMost":null,"freePlan":false,"claims":[]},{"vendor":"google","status":"no_history","basis":"claimed","firstOn":null,"firstIsNew":false,"daysToRule":null,"daysAtMost":null,"freePlan":false,"claims":[]},{"vendor":"fastly","status":"no_history","basis":"claimed","firstOn":null,"firstIsNew":false,"daysToRule":null,"daysAtMost":null,"freePlan":false,"claims":[]},{"vendor":"f5","status":"no_history","basis":"claimed","firstOn":null,"firstIsNew":false,"daysToRule":null,"daysAtMost":null,"freePlan":false,"claims":[]},{"vendor":"akamai","status":"no_source","basis":"claimed","firstOn":null,"firstIsNew":false,"daysToRule":null,"daysAtMost":null,"freePlan":false,"claims":[]},{"vendor":"crs","status":"no_history","basis":"claimed","firstOn":null,"firstIsNew":false,"daysToRule":null,"daysAtMost":null,"freePlan":false,"claims":[]}],"updatedAt":"2026-11-04T04:17:39.574Z","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","ssvc":{"exploitation":"active","automatable":"no","technicalImpact":"partial"},"kevAction":"Apply updates per vendor instructions.","kevNotes":"https://nvd.nist.gov/vuln/detail/CVE-2022-24682","references":[{"url":"https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories","name":null,"tags":["x_refsource_MISC"]},{"url":"https://wiki.zimbra.com/wiki/Security_Center","name":null,"tags":["x_refsource_MISC"]},{"url":"https://www.volexity.com/blog/2022/02/03/operation-emailthief-active-exploitation-of-zero-day-xss-vulnerability-in-zimbra/","name":null,"tags":["x_refsource_MISC"]},{"url":"https://blog.zimbra.com/2022/02/hotfix-available-5-feb-for-zero-day-exploit-vulnerability-in-zimbra-8-8-15/","name":null,"tags":["x_refsource_MISC"]},{"url":"https://wiki.zimbra.com/wiki/Zimbra_Releases/8.8.15/P30","name":null,"tags":["x_refsource_MISC"]}],"affected":[],"briefing":{"status":{"id":"known_exploited","label":"Known exploited"},"why":"CISA lists CVE-2022-24682 as exploited in the wild since 2022-02-25, including known use in ransomware campaigns. It is reachable over the network without credentials (CVSS 6.1). A public scanner template probes for it. In our benchmark, 0 of 6 WAF configurations stopped every variant of the public exploit.","who":"Teams running Synacor Zimbra Collaborate Suite (ZCS). Affected versions are in the vendor advisory. Prioritise internet-facing instances.","what_to_do":[{"text":"Find the version you run. On the Zimbra server:","command":{"where":"On the Zimbra server","command":"su - zimbra -c 'zmcontrol -v'"}},{"text":"Apply the vendor's fix; the advisory lists the affected and fixed versions."},{"text":"CISA's required action: Apply updates per vendor instructions. US federal agencies must act by 2022-03-11."},{"text":"Review exposed instances for signs of compromise: it was exploited before many systems were patched, and a later patch does not undo access already gained."},{"text":"Do not rely on WAF defaults: no edge vendor names this CVE. Restrict access to the vulnerable component or add a custom rule until it is patched.","href":"#edge","linkText":"Edge coverage"},{"text":"Check which WAF sits in front of your site and whether it covers this CVE.","href":"#check","linkText":"Check your domain"}],"evidence":[{"heading":"CVE record","text":"CVSS 3.1 6.1 (medium). Weakness: CWE-79, CWE-116.","links":[{"label":"CVE-2022-24682","href":"https://www.cve.org/CVERecord?id=CVE-2022-24682"},{"label":"NVD","href":"https://nvd.nist.gov/vuln/detail/CVE-2022-24682"}]},{"heading":"Exploit evidence","text":"A nuclei template exists, which our lab and benchmark replay.","links":[]},{"heading":"CISA KEV","text":"Added 2022-02-25, federal due date 2022-03-11, known ransomware use (catalog 2026.11.03, checked 2026-11-04).","links":[{"label":"CISA KEV catalog","href":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2022-24682"}]},{"heading":"EPSS","text":"30.9% probability of exploitation activity in the next 30 days, higher than 98% of CVEs (2026-11-02).","links":[{"label":"FIRST EPSS","href":"https://api.first.org/data/v1/epss?cve=CVE-2022-24682"}]},{"heading":"WAF vendor statements","text":"No edge vendor changelog names it.","links":[]},{"heading":"Measured","text":"0 of 6 WAF configurations stopped every variant of the public exploit in our daily benchmark.","links":[{"label":"WAF benchmark","href":"/bench"}]}],"agent_prompt":"Assess whether the infrastructure available to you is affected by CVE-2022-24682 (Synacor Zimbra Collaborate Suite (ZCS) Cross-Site Scripting Vulnerability). Perform a read-only assessment within your authorized access. Do not send exploit traffic, scan third-party systems, change configuration or restart services.\n\n1. Verify the CVE record at https://www.cve.org/CVERecord?id=CVE-2022-24682 and the vendor advisory. Establish affected and fixed versions, including vendor backports. Cite sources and retrieval dates; flag anything you cannot verify.\n2. Inventory deployments of Synacor Zimbra Collaborate Suite (ZCS): asset, environment, owner where known, installed version or build, and how you confirmed it (package metadata, a version endpoint, image tags), e.g. `su - zimbra -c 'zmcontrol -v'` (on the Zimbra server). An image tag alone does not prove the running version.\n3. Identify which deployments are reachable from the internet or untrusted networks, and through which paths (direct origin, load balancer, CDN or WAF).\n4. Assess compensating controls separately from patch status. Current edge WAF coverage for this CVE: no edge WAF vendor names it. Live data: https://cve.vigilbase.com/api/v1/cves/CVE-2022-24682. Check whether the rule is enabled and in block mode on each path, and whether any path bypasses the WAF. A WAF rule is not a patch.\n5. It is known exploited (CISA KEV): review logs on exposed instances for signs of exploitation before and after patching.\n\nReturn a short summary and a table: asset | version/build | assessment (affected, fixed, not applicable, unknown) | exposure | compensating control | evidence | next action. List what you could not assess and the access needed to resolve it. Do not infer absence of compromise from patch status or a lack of alerts.\n\nRemediation guidance: Apply the vendor's fix; the advisory lists the affected and fixed versions. CISA's required action: Apply updates per vendor instructions. US federal agencies must act by 2022-03-11.\nMore: https://cve.vigilbase.com/cve/CVE-2022-24682"},"measured":[{"engineId":"owasp-crs","engineName":"OWASP Core Rule Set","engineVersion":"4.25.0","runtime":"Coraza v3.8.1","config":"paranoia level 1, anomaly threshold 5, default CRS settings","ranAt":"2026-11-02T13:02:57.000Z","verdict":"passed","templateId":"CVE-2022-24682","templatePath":"http/cves/2022/CVE-2022-24682.yaml","requests":1,"blockedRequests":0,"rules":[],"note":"","requestDetail":[{"method":"GET","path":"/js/zimbraMail/share/model/ZmSettings.js","status":200,"blocked":false,"rules":[]}]},{"engineId":"owasp-crs","engineName":"OWASP Core Rule Set","engineVersion":"4.25.0","runtime":"Coraza v3.8.1","config":"paranoia level 2, anomaly threshold 5, default CRS settings","ranAt":"2026-11-02T13:03:28.000Z","verdict":"passed","templateId":"CVE-2022-24682","templatePath":"http/cves/2022/CVE-2022-24682.yaml","requests":1,"blockedRequests":0,"rules":[],"note":"","requestDetail":[{"method":"GET","path":"/js/zimbraMail/share/model/ZmSettings.js","status":200,"blocked":false,"rules":[]}]}],"sightings":null,"social":{"total":0,"first_seen":null,"daily":[{"day":"2026-10-22","posts":0},{"day":"2026-10-23","posts":0},{"day":"2026-10-24","posts":0},{"day":"2026-10-25","posts":0},{"day":"2026-10-26","posts":0},{"day":"2026-10-27","posts":0},{"day":"2026-10-28","posts":0},{"day":"2026-10-29","posts":0},{"day":"2026-10-30","posts":0},{"day":"2026-10-31","posts":0},{"day":"2026-11-01","posts":0},{"day":"2026-11-02","posts":0},{"day":"2026-11-03","posts":0},{"day":"2026-11-04","posts":0}],"top_posts":[],"exploit_repositories":[]}}