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Vulnerability · Published Mar 5, 2026 · Assigned by GitHub_M

CVE-2026-28222Wagtail: Improper escaping of HTML (Cross-site Scripting) on TableBlock class attributes

Medium 6.1

In plain English

A medium-severity cross-site scripting in wagtail from wagtail. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 43% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)6.1Medium
Exploit odds (30 days)0.5%top 56.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
PyPIwagtail6.3.8GHSA-p5cm-246w-84jm
PyPIwagtail7.0.6GHSA-p5cm-246w-84jm
PyPIwagtail7.2.3GHSA-p5cm-246w-84jm
PyPIwagtail7.3.1GHSA-p5cm-246w-84jm
PyPIwagtail6.3.8, 7.0.6, 7.2.3PYSEC-2026-2307

Affected products (as reported)

VendorProductVersions
wagtail wagtail < 6.3.8>= 6.4rc1, < 7.0.6>= 7.1rc1, < 7.2.3>= 7.3rc1, < 7.3.1

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:N

References