What is CVE-2016-2803?

CVE-2016-2803 is a medium-severity vulnerability in Mozilla Bugzilla, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2017-04-12.

How severe is CVE-2016-2803?

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

XSS in Mozilla Bugzilla

CVE-2016-2803

Cross-site scripting (XSS) vulnerability in the dependency graphs in Bugzilla 2.16rc1 through 4.4.11, and 4.5.1 through 5.0.2 allows remote attackers to inject arbitrary web script or HTML.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2017-04-12 · 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: 0.015 (72.9th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 73rd percentile — 72.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.015 · newest: 0.015 · change: 0.000

Affected products

Mozilla Bugzilla — versions 2.19, 4.3.2, 2.20.6

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

www.securityfocus.com/archive/1/538401/100/0/threaded (mailing-list)
www.bugzilla.org/security/4.4.11/ (VDB Entry, Third Party Advisory, Issue Tracking)
www.securitytracker.com/id/1035891 (VDB Entry, Third Party Advisory, vdb-entry)
packetstormsecurity.com/files/137079/Bugzilla-4.4.11-5.0.2-Summary-Cross-Site-S… (VDB Entry, Third Party Advisory)

Frequently asked questions

What is CVE-2016-2803?: CVE-2016-2803 is a medium-severity vulnerability in Mozilla Bugzilla, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2017-04-12.
How severe is CVE-2016-2803?: Medium severity. CVSS v3 base score is 6.1 out of 10.