Actively exploited · Published Feb 9, 2022 · Assigned by mitre
CVE-2022-24682
Medium 6.1 Exploited Ransomware
In plain English
A medium-severity security flaw in Zimbra Collaborate Suite (ZCS) from Synacor. Attackers are actively exploiting it in the wild (listed by CISA on February 25, 2022). It has been used in ransomware campaigns. The chance it is exploited in the next 30 days is estimated at 30.9% (higher than 98% of all known vulnerabilities). Ready-made attack tooling exists: Nuclei. Apply updates per vendor instructions.
CISA guidance
Apply updates per vendor instructions.
Federal agencies must remediate by Mar 11, 2022.
Official 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.
Affected products (as reported)
Weakness: CWE-116 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
References
- https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories x_refsource_MISC
- https://wiki.zimbra.com/wiki/Security_Center x_refsource_MISC
- https://www.volexity.com/blog/2022/02/03/operation-emailthief-active-exploitation-of-zero-day-xss-vulnerability-in-zimbra/ x_refsource_MISC
- https://blog.zimbra.com/2022/02/hotfix-available-5-feb-for-zero-day-exploit-vulnerability-in-zimbra-8-8-15/ x_refsource_MISC
- https://wiki.zimbra.com/wiki/Zimbra_Releases/8.8.15/P30 x_refsource_MISC
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-24682 government-resource