Skip to content

SVG sanitization bypassed for uploads whose file extension is not normalized

Moderate
jasonvarga published GHSA-7qmf-j24c-x6cx Aug 14, 2026

Package

composer statamic/cms (Composer)

Affected versions

<5.74.4, <6.27.2

Patched versions

5.74.4, 6.27.2

Description

Impact

Statamic's SVG sanitization was skipped for uploaded files whose extension was not written in plain lowercase — for example an uppercase extension, or one with trailing whitespace.

Sites that have disabled the statamic.assets.lowercase setting are affected more seriously, as an unsanitized SVG could be stored on a public, web-accessible asset disk and executed in the context of the site when viewed.

Already-stored files are not modified by this fix. Sites that ran with statamic.assets.lowercase disabled should review any existing SVG assets uploaded through a form.

Patches

This has been fixed in 5.74.4 and 6.27.2.

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
None
User interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
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:N/UI:R/S:C/C:L/I:L/A:N

CVE ID

No known CVE

Weaknesses

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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. Learn more on MITRE.

Credits