CVE-2020-16266

Name: CVE-2020-16266
Creator: NVD / NIST
Published: 2020-08-12T13:15:10.613+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 1.17%

Last modified Jun 17, 2026

CVE-2020-16266 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. An XSS issue was discovered in MantisBT before 2.24.2. Improper escaping on view_all_bug_page.php allows a remote attacker to inject arbitrary HTML into the page by saving it into a text Custom Field, leading to possible code execution in the browser of any user subsequently viewing the issue (if CSP settings allow it).. EPSS estimates a 1.17% chance of exploitation in the next 30 days.

Description

An XSS issue was discovered in MantisBT before 2.24.2. Improper escaping on view_all_bug_page.php allows a remote attacker to inject arbitrary HTML into the page by saving it into a text Custom Field, leading to possible code execution in the browser of any user subsequently viewing the issue (if CSP settings allow it).

Metrics

CVSS 3.1

5.4/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

EPSS Probability

1.17%

63.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Mantisbt	Mantisbt	< 2.24.2

References

https://mantisbt.org/blog/archives/mantisbt/665Release Notes, Vendor Advisory
https://mantisbt.org/bugs/view.php?id=27056Exploit, Issue Tracking, Patch, Vendor Advisory
https://mantisbt.org/blog/archives/mantisbt/665Release Notes, Vendor Advisory
https://mantisbt.org/bugs/view.php?id=27056Exploit, Issue Tracking, Patch, Vendor Advisory

Timeline

Published: Aug 12, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-16266?

How severe is CVE-2020-16266?

CVE-2020-16266 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 1.17% probability of exploitation in the next 30 days.

How do I fix CVE-2020-16266?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-16266?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST