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WordPress 5.8 beta: Stored Cross-Site Scripting (XSS) vulnerability in widget editor

Low
ehti published GHSA-fr6h-3855-j297 Sep 9, 2021

Package

No package listed

Affected versions

5.8 beta 1 - 5.8 beta 2

Patched versions

5.8

Description

Impact

The widgets editor introduced in WordPress 5.8 beta 1 has improper handling of HTML input in the Custom HTML feature. This leads to stored XSS in the custom HTML widget.

Patches

This has been patched in WordPress 5.8. It was only present during the testing/beta phase of WordPress 5.8.

References

https://hackerone.com/reports/1222797
https://wordpress.org/news/category/releases/

For more information

If you have any questions or comments about this advisory:

Severity

Low
3.8
/ 10

CVSS base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
High
User interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None
CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N

CVE ID

CVE-2021-39202

Weaknesses