CVE-2021-24418: Smooth Scroll Page Up/Down Buttons <= 1.4 - Authenticated Stored XSS via psb_positioning

Severity: medium (CVSS 4.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2021-07-12 · updated 2026-06-17
Weakness: CWE-79

Description

The Smooth Scroll Page Up/Down Buttons WordPress plugin through 1.4 does not properly sanitise and validate its psb_positioning settings, allowing high privilege users such as admin to set an XSS payload in it, which will be executed in all pages of the blog

Affected products

Smooth Scroll Page Up/Down Buttons: through 1.4

References

https://m0ze.ru/vulnerability/%5B2021-04-29%5D-%5BWordPress%5D-%5BCWE-79%5D-Smooth-Scroll-Page-UpDown-Buttons-WordPress-Plugin-v1.4.txt
https://wpscan.com/vulnerability/1512bba9-89e2-493d-b85d-10c7acb903db
https://m0ze.ru/vulnerability/%5B2021-04-29%5D-%5BWordPress%5D-%5BCWE-79%5D-Smooth-Scroll-Page-UpDown-Buttons-WordPress-Plugin-v1.4.txt
https://wpscan.com/vulnerability/1512bba9-89e2-493d-b85d-10c7acb903db

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