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CVE-2026-28222

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

MEDIUM
6.1
CVSS Score
Published: March 5, 2026 at 06:58 PM UTC
Updated: June 17, 2026 at 10:28 AM UTC
2 products affected across 2 vendorsWagtailWagtail

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Severity
MEDIUM6.1
Exploit prediction
EPSS 0.5%
SSVC
No known exploit

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Wagtail· Torchbox
95%
v < 6.3.86.4 ≤ v < 7.0.67.1 ≤ v < 7.2.37.37.3 rc1
Wagtail· Wagtailpypi
60%
v < 6.3.8v < 7.0.6v < 7.2.3v < 7.3.1
Affected range stops below 6.3.8, so it looks safe — our inference, not a vendor statement
Affected range stops below 7.0.6, so it looks safe — our inference, not a vendor statement
Affected range stops below 7.2.3, so it looks safe — our inference, not a vendor statement
Affected range stops below 7.3.1, so it looks safe — our inference, not a vendor statement

References (9)

x_refsource_CONFIRMMitigationVendor Advisory
Source: cverecord
https://github.com/wagtail/wagtail/security/advisories/GHSA-p5cm-246w-84jm
x_refsource_MISCPatch
Source: cverecord
https://github.com/wagtail/wagtail/commit/0375094bb57ce6e527005c2bb2e871dd20bca04d
x_refsource_MISCPatch
Source: cverecord
https://github.com/wagtail/wagtail/commit/4620423cb22c5253391a0f04178089c1162f6e2e
x_refsource_MISCPatch
Source: cverecord
https://github.com/wagtail/wagtail/commit/575c0d7c18c7716ed73f7a3c2720ad75956f0a85
x_refsource_MISCPatch
Source: cverecord
https://github.com/wagtail/wagtail/commit/605a5569686565e035313222e1bc2f9802fbc55b
x_refsource_MISCProductRelease Notes
Source: cverecord
https://github.com/wagtail/wagtail/releases/tag/v6.3.8
x_refsource_MISCProductRelease Notes
Source: cverecord
https://github.com/wagtail/wagtail/releases/tag/v7.0.6
x_refsource_MISCProductRelease Notes
Source: cverecord
https://github.com/wagtail/wagtail/releases/tag/v7.2.3

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.1MEDIUMGitHub_M
Attack Vector
NETWORK
Complexity
LOW
Privileges
HIGH
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-79

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