Staging Environment: Content and features may be unstable or change without notice.
Advisory details: ruby_advisory_db / gems/camaleon_cms/GHSA-r9cr-qmfw-pmrc
Advisory ID ruby_advisory_db/gems/camaleon_cms/GHSA-r9cr-qmfw-pmrc
Aliases GHSA-r9cr-qmfw-pmrc
Summary Camaleon CMS vulnerable to stored XSS through user file upload (GHSL-2024-184) A stored cross-site scripting has been found in the image upload functionality that can be used by normal registered users: It is possible to upload a SVG image containing JavaScript and it's also possible to upload a HTML document when the format parameter is manually changed to [documents][1] or a string of an [unsupported format][2]. If an authenticated user or administrator visits that uploaded image or document malicious JavaScript can be executed on their behalf (e.g. changing or deleting content inside of the CMS.) [1]: https://github.com/owen2345/camaleon-cms/blob/feccb96e542319ed608acd3a16fa5d92f13ede67/app/uploaders/camaleon_cms_uploader.rb#L105-L106 [2]: https://github.com/owen2345/camaleon-cms/blob/feccb96e542319ed608acd3a16fa5d92f13ede67/app/uploaders/camaleon_cms_uploader.rb#L110-L111 ## Impact This issue may lead to account takeover due to reflected Cross-site scripting (XSS). ## Remediation Only allow the upload of safe files such as PNG, TXT and others or serve all "unsafe" files such as SVG and other files with a content-disposition: attachment header, which should prevent browsers from displaying them. Additionally, a [Content security policy (CSP)][3] can be created that disallows inlined script. (Other parts of the application might need modification to continue functioning.) [3]: https://web.dev/articles/csp To prevent the theft of the auth_token it could be marked with HttpOnly. This would however not prevent that actions could be performed as the authenticated user/administrator. Furthermore, it could make sense to use the authentication provided by Ruby on Rails, so that stolen tokens cannot be used anymore after some time.
Status Published
Exploitability 0.5
Weighted Severity 0.0
Risk
Affected and Fixed Packages Package Details
Introduced and Fixed Package Commit Patches Package Commit Patches Details
Weaknesses (0)
There are no known CWE.
System Score Found at
cvssv3 5.4
cvssv4 4.8
Reference id Reference type URL
GHSA-r9cr-qmfw-pmrc https://github.com/owen2345/camaleon-cms/security/advisories/GHSA-r9cr-qmfw-pmrc
No exploits are available.

No EPSS data available for this advisory.

Patch URL
There are no known patches.
There are no known vectors.

There are no SSVC decisions available.