CVE-2026-119565

Description

Plausible Analytics through 3.2.1 contains a mass assignment vulnerability in update_traffic_change_notification that allows authenticated site editors to reassign notifications by supplying a site_id parameter. Attackers can submit traffic_change_notification[site_id] set to another site's primary key via PUT /sites/:domain/traffic-change-notification/:type to receive that site's traffic alerts and visitor figures.

Metrics

CVSS 3.1

4.3 (MEDIUM) Score source: CNA CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

CVSS 4.0

5.3 (MEDIUM) Score source: CNA CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS — exploit probability

0% (percentile: 24) as of 1 November 2026

CWE

CWE-915

References

• https://abraxaslabs.tech/research/plausible-traffic-notify
• https://github.com/plausible/analytics
• https://github.com/plausible/analytics/blob/v3.2.1/lib/plausible/site/traffic_c…
• https://github.com/plausible/analytics/blob/v3.2.1/lib/plausible_web/controller…
• https://www.vulncheck.com/advisories/plausible-analytics-through-3.2.1-mass-ass…