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Silverstripe has Cross-site Scripting (XSS) vulnerabilities inherited from TinyMCE

Moderate severity GitHub Reviewed Published Jul 31, 2023 in silverstripe/silverstripe-admin

Package

composer silverstripe/admin (Composer)

Affected versions

< 1.13.6

Patched versions

1.13.6

Description

TinyMCE 4.x is vulnerable to several XSS vectors, which had been patched in later versions. Two of these have been identified as affecting silverstripe/admin.

Only Silverstripe CMS 4 is affected by this issue. It's not possible to upgrade Silverstripe CMS 4 to use a more recent release of TinyMCE without introducing breaking changes. Instead, the security patches that shipped in later releases of TinyMCE have been backported to the TinyMCE version bundled in silverstripe/admin.

Silverstripe CMS 5 is not affected by those vulnerabilities because it uses TinyMCE 6.

You can find more information about the underlying vulnerabilities in those GitHub security advisories:

References

@maxime-rainville maxime-rainville published to silverstripe/silverstripe-admin Jul 31, 2023
Published to the GitHub Advisory Database Jul 31, 2023
Reviewed Jul 31, 2023

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
Unchanged
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:U/C:L/I:L/A:N

Weaknesses

No CWEs

CVE ID

No known CVE

GHSA ID

GHSA-4q66-g4mm-8rg5

Source code

Credits

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