Vulnerability · Published May 8, 2026 · Assigned by GitHub_M
CVE-2026-42192Plunk: Stored XSS in campaign view
Medium 5.4
In plain English
A medium-severity cross-site scripting in plunk from useplunk. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 7% of all known vulnerabilities).
Official description
Plunk is an open-source email platform built on top of AWS SES. Prior to version 0.9.0, a stored cross-site scripting (XSS) vulnerability exists in the campaign management feature, where the email body content created by authenticated project members is stored and later rendered in the admin dashboard using React's dangerouslySetInnerHTML without any HTML sanitization. This allows a lower-privileged member to embed malicious scripts in a campaign's email body that execute in the context of any admin or other member who views the campaign, potentially enabling session hijacking or unauthorized actions on their behalf. This issue has been patched in version 0.9.0.
Affected products (as reported)
Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
References
- https://github.com/useplunk/plunk/security/advisories/GHSA-mjqc-qrv3-24hq x_refsource_CONFIRM
- https://github.com/useplunk/plunk/releases/tag/v0.9.0 x_refsource_MISC