What is CVE-2016-3411?

CVE-2016-3411 is a medium-severity vulnerability in Synacor Zimbra Collaboration Suite, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2017-01-18.

How severe is CVE-2016-3411?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Is CVE-2016-3411 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 Suite

CVE-2016-3411

Cross-site scripting (XSS) vulnerability in Zimbra Collaboration before 8.7.0 allows remote attackers to inject arbitrary web script or HTML via unspecified vectors, aka bug 103609.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2017-01-18 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.037 (89.2th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 89th percentile — 89.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.037 · newest: 0.037 · change: 0.000

Affected products

Synacor Zimbra Collaboration Suite

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

ARPSyndicate/cvemon

References

wiki.zimbra.com/wiki/Zimbra_Releases/8.7.0 (Release Notes)
wiki.zimbra.com/wiki/Zimbra_Security_Advisories (Vendor Advisory)
www.securityfocus.com/bid/95901 (vdb-entry)
www.exploit-db.com/exploits/45177/ (exploit)

Frequently asked questions

What is CVE-2016-3411?: CVE-2016-3411 is a medium-severity vulnerability in Synacor Zimbra Collaboration Suite, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2017-01-18.
How severe is CVE-2016-3411?: Medium severity. CVSS v3 base score is 6.1 out of 10.
Is CVE-2016-3411 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.