CVE-2026-21483
listmonk Vulnerable to Stored XSS Leading to Admin Account Takeover in github.com/knadh/listmonk
EPSS 0.01%
Description
listmonk Vulnerable to Stored XSS Leading to Admin Account Takeover in github.com/knadh/listmonk. NOTE: The source advisory for this report contains additional versions that could not be automatically mapped to standard Go module versions. (If this is causing false-positive reports from vulnerability scanners, please suggest an edit to the report.) The additional affected modules and versions are: github.com/knadh/listmonk from v1.1.1 before v6.0.0.
How to fix CVE-2026-21483
To remediate CVE-2026-21483, upgrade the affected package to a fixed version below.
- —upgrade to 6.0.0 or later
- —upgrade to 1.1.1-0.20251231125615-74dc5a01cfbb or later
Is CVE-2026-21483 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- >= 1.1.1, < 6.0.0
- from 0, < 1.1.1-0.20251231125615-74dc5a01cfbb
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N/E:P |