MEDIUM6.1

GHSA-6hh6-59j2-qrxw

Silverstripe History XSS Vulnerability

Quick fix

GHSA-6hh6-59j2-qrxw — silverstripe/cms: upgrade to the fixed version with the command below.

composer require silverstripe/cms:^3.1.10

Details

A cross-site scripting vulnerability has been discovered in the CMS page history tab.

This vulnerability can only be exploited if a user with CMS access has posted malicious or unescaped HTML into any of the text fields on a page, and if the "compare mode" option is selected. The HTML will be embedded into the page unescaped.

This has been resolved by performing the text comparison in a HTML friendly way.

Are you affected?

Enter the version of the package you're using.

Affected packages

Packagist/silverstripe/cms

Introduced in: 3.1.0Fixed in: 3.1.10

Fixcomposer require silverstripe/cms:^3.1.10

References

https://github.com/FriendsOfPHP/security-advisories/blob/master/silverstripe/cms/SS-2015-003-1.yaml[WEB]
https://github.com/silverstripe/silverstripe-cms[PACKAGE]
https://www.silverstripe.org/software/download/security-releases/ss-2015-003[WEB]