What is CVE-2015-2249?

CVE-2015-2249 is a medium-severity vulnerability in Synacor Zimbra Collaboration Server, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2020-01-27.

How severe is CVE-2015-2249?

Medium severity. CVSS v3 base score is 5.4 out of 10.

Is CVE-2015-2249 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Synacor Zimbra Collaboration Server

CVE-2015-2249

Zimbra Collaboration before 8.6.0 patch5 has XSS.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2020-01-27 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.007 (51.0th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 51st percentile — 51.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

Synacor Zimbra Collaboration Server — versions 8.6.0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

ARPSyndicate/cvemon

References

wiki.zimbra.com/wiki/Zimbra_Security_Advisories (Vendor Advisory)

Frequently asked questions

What is CVE-2015-2249?: CVE-2015-2249 is a medium-severity vulnerability in Synacor Zimbra Collaboration Server, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2020-01-27.
How severe is CVE-2015-2249?: Medium severity. CVSS v3 base score is 5.4 out of 10.
Is CVE-2015-2249 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.