CVE-2021-24331

Smooth Scroll Page Up/Down Buttons < 1.4 - Authenticated Stored XSS

4.8 Medium

The Smooth Scroll Page Up/Down Buttons WordPress plugin before 1.4 did not properly sanitise and validate its settings, such as psb_distance, psb_buttonsize, psb_speed, only validating them client side. This could allow high privilege users (such as admin) to set XSS payloads in them

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: High
User interaction: Required

What an attacker can affect

Confidentiality: Low
Integrity: Low
Availability: None

Exploit likelihood

0.65%Unchanged since Jun 2, 2021

What each source reports

NVD Score used 4.8

Record: CVE-2021-24331
CVSS 3.1: 4.8 MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
CVSS 2.0: 3.5 LowAV:N/AC:M/Au:S/C:N/I:P/A:N
Weakness: CWE-79
Updated: 2026-11-02

CVE List No score

Smooth Scroll Page Up/Down Buttons < 1.4 - Authenticated Stored XSS

Record: CVE-2021-24331
Weakness: CWE-79
Updated: 2026-11-02

EUVDEUVD-2021-11244 No score

Record: EUVD-2021-11244
Updated: 2026-11-03

GitHub AdvisoriesGHSA-7mh2-3h46-3mff No score

The Smooth Scroll Page Up/Down Buttons WordPress plugin before 1.4 did not properly sanitise and...

Record: GHSA-7mh2-3h46-3mff
Weakness: CWE-79
Updated: 2026-11-02

Affected products

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases, products	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2021-24331 is a medium vulnerability (CVSS 4.8) in Mark Senff Smooth Scroll Page Up/down Buttons, published June 1, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.65%, the 51st percentile. No source names a fixed version.