What is CVE-2018-5123?

CVE-2018-5123 is a high-severity vulnerability in Mozilla Bugzilla, classified under Cross-Site Request Forgery (CSRF). CVSS score: 8.8/10. Published 2019-04-29.

How severe is CVE-2018-5123?

High severity. CVSS v3 base score is 8.8 out of 10.

CSRF in Mozilla Bugzilla

CVE-2018-5123

A third party website can access information available to a user with access to a restricted bug entry using the image generation in report.cgi in all Bugzilla versions prior to 4.4.

Vulnerability class: CSRF (Cross-Site Request Forgery)

Published 2019-04-29 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.005 (40.7th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 41st percentile — 40.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Mozilla Bugzilla — versions All versions prior to Bugzilla 4.4

Weakness classification (CWE)

CWE-352 — Cross-Site Request Forgery (CSRF)

References

bugzilla.mozilla.org/show_bug.cgi (Exploit, Patch, Issue Tracking, Vendor Advisory)

Frequently asked questions

What is CVE-2018-5123?: CVE-2018-5123 is a high-severity vulnerability in Mozilla Bugzilla, classified under Cross-Site Request Forgery (CSRF). CVSS score: 8.8/10. Published 2019-04-29.
How severe is CVE-2018-5123?: High severity. CVSS v3 base score is 8.8 out of 10.