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Vulnerability · Published Apr 13, 2021 · Assigned by GitHub_M

CVE-2021-29438Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) in @nextcloud/dialogs

Medium 4.6

In plain English

A medium-severity cross-site scripting in nextcloud-dialogs from nextcloud. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 53% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)4.6Medium
Exploit odds (30 days)0.7%top 46.5% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

The Nextcloud dialogs library (npm package @nextcloud/dialogs) before 3.1.2 insufficiently escaped text input passed to a toast. If your application displays toasts with user-supplied input, this could lead to a XSS vulnerability. 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
npm@nextcloud/dialogs3.1.2GHSA-g3fq-3v3g-mh32

Affected products (as reported)

VendorProductVersions
nextcloud nextcloud-dialogs < 3.1.2

Weakness: CWE-79, CWE-80 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N

References