Stored Cross-Site Scripting Vulnerability in Plunk Email Platform by AWS
CVE-2026-42192

5.4MEDIUM

Key Information:

Vendor

Useplunk

Status
Plunk
Vendor
CVE Published:
8 May 2026

What is CVE-2026-42192?

The Plunk email platform contains a stored Cross-Site Scripting (XSS) vulnerability in its campaign management feature. This issue allows authenticated project members to create email content that is subsequently rendered in the admin dashboard using React's dangerouslySetInnerHTML method without proper HTML sanitization. As a result, lower-privileged users can embed malicious scripts within email bodies. When an admin or other members view the affected campaign, the scripts execute in their context, which could lead to session hijacking or unauthorized actions. This vulnerability was addressed in version 0.9.0.

Affected Version(s)

plunk < 0.9.0

References

https://github.com/useplunk/plunk/security/advisories/GHS...
x_refsource_CONFIRM
https://github.com/useplunk/plunk/releases/tag/v0.9.0
x_refsource_MISC

CVSS V3.1

Score:
5.4
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
Required
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.