CVE-2018-10939 — Zimbra Web Client (ZWC) in Zimbra Collaboration Suite 8

Zimbra Web Client (ZWC) in Zimbra Collaboration Suite 8.8 before 8.8.8.Patch4 and 8.7 before 8.7.11.Patch4 has Persistent XSS via a contact group.

01What is this vulnerability?

Zimbra Web Client (ZWC) in Zimbra Collaboration Suite 8.8 before 8.8.8.Patch4 and 8.7 before 8.7.11.Patch4 has Persistent XSS via a contact group.

02Affected products

Vendor	Product	Versions
n	a / n/a	n/a

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2018-05-30T21:00:00.000Z
• Last modified: 2024-08-05T07:54:35.796Z

09References

• wiki.zimbra.com — https://wiki.zimbra.com/wiki/Security_Center
• wiki.zimbra.com — https://wiki.zimbra.com/wiki/Zimbra_Releases/8.8.8/P4
• blog.zimbra.com — https://blog.zimbra.com/2018/05/new-zimbra-patches-8-8-8-patch-4-and-8-7-11-patc…
• wiki.zimbra.com — https://wiki.zimbra.com/wiki/Zimbra_Releases/8.7.11/P4
• wiki.zimbra.com — https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories