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Privilege escalation via stored cross-site scripting

High
jasonvarga published GHSA-ff9r-ww9c-43x8 Feb 11, 2026

Package

composer statamic/cms (Composer)

Affected versions

>= 6.0.0, <6.2.3

Patched versions

6.2.3

Description

Impact

Stored XSS vulnerability in content titles allow authenticated users with content creation permissions to inject malicious JavaScript that executes when viewed by higher-privileged users.

Malicious user must have an account with control panel access and content creation permissions.

This vulnerability can be exploited to allow super admin accounts to be created.

Patches

This has been fixed in 6.2.3.

Severity

High

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
Required
Scope
Changed
Confidentiality
High
Integrity
High
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:R/S:C/C:H/I:H/A:N

CVE ID

CVE-2026-25759

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