What is CVE-2026-42192?

CVE-2026-42192 is a medium-severity vulnerability in Useplunk Plunk, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-05-08.

How severe is CVE-2026-42192?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Useplunk Plunk

CVE-2026-42192

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 proj…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.000 (1.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

Affected products

Useplunk Plunk — versions < 0.9.0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

security-advisories@github.com (x_refsource_CONFIRM)
security-advisories@github.com (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-42192?: CVE-2026-42192 is a medium-severity vulnerability in Useplunk Plunk, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-05-08.
How severe is CVE-2026-42192?: Medium severity. CVSS v3 base score is 5.4 out of 10.