# CVE-2022-24682: Synacor Zimbra Collaborate Suite (ZCS) Cross-Site Scripting Vulnerability

> CVE-2022-24682: Synacor Zimbra Collaborate Suite (ZCS) Cross-Site Scripting Vulnerability. CVSS 6.1 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2022-24682
Last updated: 2026-08-07T03:55:20Z

- Published: 2022-02-09 03:19 UTC · Updated: 2026-08-07 03:55 UTC · Assigner: mitre
- CVSS: 6.1 (CVSS 3.1) · Severity: Medium · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- EPSS: 30.9%, 98th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2022-02-25, federal due date 2022-03-11, ransomware use: Known

## 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.

## CISA required action

Apply updates per vendor instructions.

## Affected vendors and products

- Synacor: Zimbra Collaborate Suite (ZCS)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2022-24682)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2022-24682)
- [https://blog.zimbra.com/2022/02/hotfix-available-5-feb-for-zero-day-exploit-vulnerability-in-zimbra-8-8-15/](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/Security\_Center](https://wiki.zimbra.com/wiki/Security_Center)
- [https://wiki.zimbra.com/wiki/Zimbra\_Releases/8.8.15/P30](https://wiki.zimbra.com/wiki/Zimbra_Releases/8.8.15/P30)
- [https://wiki.zimbra.com/wiki/Zimbra\_Security\_Advisories](https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories)
- [https://www.volexity.com/blog/2022/02/03/operation-emailthief-active-exploitation-of-zero-day-xss-vulnerability-in-zimbra/](https://www.volexity.com/blog/2022/02/03/operation-emailthief-active-exploitation-of-zero-day-xss-vulnerability-in-zimbra/)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2022-24682 · Markdown: https://rewindex.com/cve/CVE-2022-24682.md · JSON: https://rewindex.com/api/v1/cves/CVE-2022-24682 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:13:19.600Z