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

Q: How do I fix CVE-2021-24418?

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

Q: Is CVE-2021-24418 being exploited?

CVE-2021-24418 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-2021-24418 affect?

CVE-2021-24418 affects smooth scroll page up\/down buttons. Severity is medium (CVSS 4.8). 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

Q: How urgent is CVE-2021-24418?

Priority 34/100. Public exploit reference

Routine

MEDIUM 4.8UPGRADE

CVE-2021-24418 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 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

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	0.6% (top 50%)
CISA exploited list	No
Weakness	CWE-79
Published	2021-07-12
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

2021-07-12 20:15 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: newer than 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 newer than 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-2021-24418?

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

Is CVE-2021-24418 being exploited?

CVE-2021-24418 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-2021-24418 affect?

CVE-2021-24418 affects smooth scroll page up\/down buttons. Severity is medium (CVSS 4.8). 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

How urgent is CVE-2021-24418?

Priority 34/100. Public exploit reference

Software pages

WordPress vulnerabilities

Related CVEs

CVE-2021-24331 MEDIUM 4.8 UPGRADE The Smooth Scroll Page Up/Down Buttons WordPress plugin before 1.4 did not properly sanitise and validate its

References

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