CVE-2020-4052

Name: CVE-2020-4052
Creator: NVD / NIST
Published: 2020-06-16T22:15:10.503+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 0.83%

Last modified Jun 17, 2026

CVE-2020-4052 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. In Wiki.js before 2.4.107, there is a stored cross-site scripting through template injection. This vulnerability exists due to an insecure validation mechanism intended to insert v-pre tags into rendered HTML elements which contain curly-braces. EPSS estimates a 0.83% chance of exploitation in the next 30 days.

Description

In Wiki.js before 2.4.107, there is a stored cross-site scripting through template injection. This vulnerability exists due to an insecure validation mechanism intended to insert v-pre tags into rendered HTML elements which contain curly-braces. By creating a crafted wiki page, a malicious Wiki.js user may stage a stored cross-site scripting attack. This allows the attacker to execute malicious JavaScript when the page is viewed by other users. This has been patched in 2.4.107.

Metrics

CVSS 3.1

6.1/10

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

EPSS Probability

0.83%

53.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Requarks	Wiki.Js	< 2.4.107

References

https://github.com/Requarks/wiki/commit/9e08718ee904046f8b2294ef6ac79e8a75a451e3Patch, Third Party Advisory
https://github.com/Requarks/wiki/security/advisories/GHSA-9jgg-4xj2-vjjjThird Party Advisory
https://github.com/Requarks/wiki/commit/9e08718ee904046f8b2294ef6ac79e8a75a451e3Patch, Third Party Advisory
https://github.com/Requarks/wiki/security/advisories/GHSA-9jgg-4xj2-vjjjThird Party Advisory

Timeline

Published: Jun 16, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-4052?

How severe is CVE-2020-4052?

CVE-2020-4052 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 0.83% probability of exploitation in the next 30 days.

How do I fix CVE-2020-4052?

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-2020-4052?

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

Scan your code now

Source: NVD / NIST