What is CVE-2018-10948?

CVE-2018-10948 is a medium-severity vulnerability in Synacor Zimbra Collaboration Suite, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2019-05-30.

How severe is CVE-2018-10948?

Medium severity. CVSS v3 base score is 4.8 out of 10.

XSS in Synacor Zimbra Collaboration Suite

CVE-2018-10948

Synacor Zimbra Admin UI in Zimbra Collaboration Suite before 8.8.0 beta 2 has Persistent XSS via mail addrs.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2019-05-30 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.008 (53.5th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 54th percentile — 53.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: -0.000

Affected products

Synacor Zimbra Collaboration Suite — versions 8.8.0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

bugzilla.zimbra.com/show_bug.cgi (Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2018-10948?: CVE-2018-10948 is a medium-severity vulnerability in Synacor Zimbra Collaboration Suite, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2019-05-30.
How severe is CVE-2018-10948?: Medium severity. CVSS v3 base score is 4.8 out of 10.