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GHSA-g3fq-3v3g-mh32

Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) in @nextcloud/dialogs

Source: GitHub Advisory Database (reviewed) Moderate CVE-2021-29438

Packages

EcosystemPackageAffectedFixed in
npm @nextcloud/dialogs < 3.1.2 3.1.2

Details

As written in the advisory (Markdown source, shown as plain text).

### Impact The Nextcloud dialogs library before 3.1.2 did insufficiently escape text input passed to a toast. If your application displays toasts with user-supplied input, this could lead to a XSS vulnerability. _Note_: Nextcloud Server employs a strict Content Security Policy that mitigates the risk of these XSS vulnerabilities. ### Patches The vulnerability has been patched in version 3.1.2. If you need to display HTML in the toast, explicitly pass the `options.isHTML` config flag. ### Workarounds Make sure no user-supplied input flows into toasts.

References

External links from the advisory. They lead to third-party sites.