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Wagtail: Improper permission handling when copying snippets

Moderate severity GitHub Reviewed Published Aug 20, 2026 in wagtail/wagtail • Updated Aug 20, 2026

Package

pip wagtail (pip)

Affected versions

< 7.0.9
>= 7.1, < 7.3.4
>= 7.4, < 7.4.3
= 8.0rc1

Patched versions

7.0.9
7.3.4
7.4.3
8.0rc2

Description

Impact

A CMS user with "add" permission over a snippet model, but not "change" or "view" permission, could copy an existing snippet that they do not have access to, allowing them to view its contents.

Patches

Patched versions have been released as Wagtail 7.0.9, 7.3.4, 7.4.3 and 8.0rc2.

Workarounds

N/A

Acknowledgements

Many thanks to tinyb0y for reporting this issue.

For more information

If you have any questions or comments about this advisory:

References

@gasman gasman published to wagtail/wagtail Aug 20, 2026
Published to the GitHub Advisory Database Aug 20, 2026
Reviewed Aug 20, 2026
Last updated Aug 20, 2026

Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

EPSS score

Weaknesses

Improper Handling of Insufficient Permissions or Privileges

The product does not handle or incorrectly handles when it has insufficient privileges to access resources or functionality as specified by their permissions. This may cause it to follow unexpected code paths that may leave the product in an invalid state. Learn more on MITRE.

CVE ID

No known CVE

GHSA ID

GHSA-x5cx-w6p2-mxf2

Source code

Credits

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