CVE-2022-24682
synacor zimbra collaboration suite
Published 9 Feb 2022 · updated 7 Aug 2026 · Analyzed
6.1 Medium · CVSS 3.1, NVD
Exploited in the wild
CISA added this to its Known Exploited Vulnerabilities catalog on 25 Feb 2022, with a remediation deadline of 11 Mar 2022 for US federal agencies. It has been used in ransomware campaigns.
Required action: Apply updates per vendor instructions.
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.
References
- blog.zimbra.com/2022/02/hotfix-available-5-feb-for-zero-day-exploit-vulnerability-in-zimbra-8-8-15/ · Vendor Advisory
- wiki.zimbra.com/wiki/Security_Center · Vendor Advisory
- wiki.zimbra.com/wiki/Zimbra_Releases/8.8.15/P30 · Release Notes, Vendor Advisory
- wiki.zimbra.com/wiki/Zimbra_Security_Advisories · Vendor Advisory
- www.volexity.com/blog/2022/02/03/operation-emailthief-active-exploitation-of-zero-day-xss-vulnerability-in-zimbra/ · Exploit, Third Party Advisory
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-24682 · US Government Resource