CVE-2026-28222: Wagtail Vulnerable to Cross-site Scripting in TableBlock class attributes
(updated )
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.
References
- github.com/advisories/GHSA-p5cm-246w-84jm
- github.com/wagtail/wagtail
- github.com/wagtail/wagtail/commit/0375094bb57ce6e527005c2bb2e871dd20bca04d
- github.com/wagtail/wagtail/commit/4620423cb22c5253391a0f04178089c1162f6e2e
- github.com/wagtail/wagtail/commit/575c0d7c18c7716ed73f7a3c2720ad75956f0a85
- github.com/wagtail/wagtail/commit/605a5569686565e035313222e1bc2f9802fbc55b
- github.com/wagtail/wagtail/releases/tag/v6.3.8
- github.com/wagtail/wagtail/releases/tag/v7.0.6
- github.com/wagtail/wagtail/releases/tag/v7.2.3
- github.com/wagtail/wagtail/releases/tag/v7.3.1
- github.com/wagtail/wagtail/security/advisories/GHSA-p5cm-246w-84jm
- nvd.nist.gov/vuln/detail/CVE-2026-28222
Code Behaviors & Features
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