CVE-2022-24682
Synacor Zimbra Collaborate Suite (ZCS) Cross-Site Scripting Vulnerability is confirmed as actively exploited and is listed in the CISA KEV catalog.
Required action
Apply updates per vendor instructions.
CISA notes
https://nvd.nist.gov/vuln/detail/CVE-2022-24682
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.
Severity
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:NExploitation Context
as of October 14, 2026- CISA added CVE-2022-24682 to the KEV catalog 16 days after its CVE record was published.
- It is one of 19 Zimbra entries in the CISA KEV catalog, and one of 7 added in 2022.
- Its current EPSS score (30.9%) is higher than that of 42% of CISA KEV entries.
Affected Products
| Vendor | Product | Affected versions |
|---|---|---|
| - | - | n/a |
References
5 Links- https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories
- https://wiki.zimbra.com/wiki/Security_Center
- https://www.volexity.com/blog/2022/02/03/operation-emailthief-active-exploitation-of-zero-day-xss-vulnerability-in-zimbra/
- https://blog.zimbra.com/2022/02/hotfix-available-5-feb-for-zero-day-exploit-vulnerability-in-zimbra-8-8-15/
- https://wiki.zimbra.com/wiki/Zimbra_Releases/8.8.15/P30
Record Details
More from Zimbra
Synacor Zimbra Collaboration Suite (ZCS) Improper Restriction of XML External Entity Reference
Synacor Zimbra Collaboration Suite (ZCS) Command Execution Vulnerability
Synacor Zimbra Collaboration Suite (ZCS) Arbitrary File Upload Vulnerability
Synacor Zimbra Collaboration Suite (ZCS) Arbitrary File Upload Vulnerability
CVE record data © The MITRE Corporation, used under the CVE Terms of Use. Exploited-in-the-wild data from the CISA Known Exploited Vulnerabilities catalog (CC0). Exploit prediction scores by FIRST EPSS (first.org/epss). This site is not endorsed or certified by MITRE, NVD, CISA, or FIRST.