CVE-2021-24331: The Smooth Scroll Page Up/Down Buttons WordPress plugin before 1.4 did not properly sanitise and validate its

Q: How do I fix CVE-2021-24331?

smooth scroll page up\/down buttons: upgrade to 1.4. Exact commands for each OS are on this page.

Q: Is CVE-2021-24331 being exploited?

CVE-2021-24331 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2021-24331 affect?

CVE-2021-24331 affects smooth scroll page up\/down buttons. Severity is medium (CVSS 4.8). 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

Q: How urgent is CVE-2021-24331?

Priority 35/100. Public exploit reference

Routine

MEDIUM 4.8UPGRADE

CVE-2021-24331 is a medium-severity flaw (CVSS 4.8) affecting smooth scroll page up\/down buttons. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	4.8 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	Required
EPSS exploit chance	0.7% (top 49%)
CISA exploited list	No
Weakness	CWE-79
Published	2021-06-01
Last modified	2026-06-17

Publisher (CNA): WPScan · Vendor: smooth scroll page up\/down buttons project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2021-06-01 14:15 UTCPublished CVE record published
2026-06-17 03:39 UTCUpdated Record last modified

smooth scroll page up\/down buttons project smooth scroll page up\/down buttons UPGRADE

Affected: < 1.4

Fixed in: 1.4

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy smooth-scroll-page-updown-buttons || rpm -q smooth-scroll-page-updown-buttons || smooth-scroll-page-updown-buttons --version

2. UPGRADE to 1.4 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade smooth-scroll-page-updown-buttons

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade smooth-scroll-page-updown-buttons

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-24331?

smooth scroll page up\/down buttons: upgrade to 1.4. Exact commands for each OS are on this page.

Is CVE-2021-24331 being exploited?

CVE-2021-24331 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-24331 affect?

CVE-2021-24331 affects smooth scroll page up\/down buttons. Severity is medium (CVSS 4.8). 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

How urgent is CVE-2021-24331?

Priority 35/100. Public exploit reference

Software pages

WordPress vulnerabilities

Related CVEs

CVE-2021-24418 MEDIUM 4.8 UPGRADE The Smooth Scroll Page Up/Down Buttons WordPress plugin through 1.4 does not properly sanitise and validate it

References

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