Wagtail up to 6.3.7/7.0.5/7.2.2/7.3.0 cross site scripting

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Wagtail up to 6.3.7/7.0.5/7.2.2/7.3.0. This impacts an unknown function. The manipulation leads to cross site scripting. This vulnerability is traded as CVE-2026-28222. It is possible to initiate the attack remotely. There is no exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Wagtail up to 6.3.7/7.0.5/7.2.2/7.3.0 and classified as problematic. This issue affects an unknown functionality. The manipulation with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. Impacted is integrity. The summary by CVE is:

Wagtail is an open source content management system built on Django. Prior to versions 6.3.8, 7.0.6, 7.2.3, and 7.3.1, a stored cross-site scripting (XSS) vulnerability exists on rendering TableBlock blocks within a StreamField. A user with access to create or edit pages containing TableBlock StreamField blocks is able to set specially-crafted class attributes on the block which run arbitrary JavaScript code when the page is viewed. When viewed by a user with higher privileges, this could lead to performing actions with that user's credentials. The vulnerability is not exploitable by an ordinary site visitor without access to the Wagtail admin, and only affects sites using TableBlock. This issue has been patched in versions 6.3.8, 7.0.6, 7.2.3, and 7.3.1.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-28222 since 02/25/2026. The exploitation is known to be easy. The attack may be initiated remotely. Additional levels of successful authentication are needed for exploitation. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK.

Upgrading to version 6.3.8, 7.0.6, 7.2.3 or 7.3.1 eliminates this vulnerability.

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Productinfo

Name

• Wagtail

Version

• 6.3.0
• 6.3.1
• 6.3.2
• 6.3.3
• 6.3.4
• 6.3.5
• 6.3.6
• 6.3.7
• 7.0
• 7.0.0
• 7.0.1
• 7.0.2
• 7.0.3
• 7.0.4
• 7.0.5
• 7.1
• 7.2
• 7.2.0
• 7.2.1
• 7.2.2
• 7.3.0

Website

• Product: https://github.com/wagtail/wagtail/

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