CVE-2021-24326: The tab parameter of the settings page of the All 404 Redirect to Homepage WordPress plugin before 1.21 was vu

Q: How do I fix CVE-2021-24326?

all 404 redirect to homepage: upgrade to 1.21. Exact commands for each OS are on this page.

Q: Is CVE-2021-24326 being exploited?

CVE-2021-24326 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-2021-24326 affect?

CVE-2021-24326 affects all 404 redirect to homepage. Severity is medium (CVSS 5.4). The tab parameter of the settings page of the All 404 Redirect to Homepage WordPress plugin before 1.21 was vulnerable to an authenticated reflected Cross-Site Scripting (XSS) issue as user input was not properly sanitised before being outp

Q: How urgent is CVE-2021-24326?

Priority 36/100. Public exploit reference

Routine

MEDIUM 5.4UPGRADE

CVE-2021-24326 is a medium-severity flaw (CVSS 5.4) affecting all 404 redirect to homepage. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The tab parameter of the settings page of the All 404 Redirect to Homepage WordPress plugin before 1.21 was vulnerable to an authenticated reflected Cross-Site Scripting (XSS) issue as user input was not properly sanitised before being output in an attribute.

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	5.4 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.6% (top 50%)
CISA exploited list	No
Weakness	CWE-79
Published	2021-05-17
Last modified	2026-06-17

Publisher (CNA): WPScan · Vendor: clogica

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

Am I affected?

Timeline

2021-05-17 17:15 UTCPublished CVE record published
2026-06-17 03:39 UTCUpdated Record last modified

clogica all 404 redirect to homepage UPGRADE

Affected: < 1.21

Fixed in: 1.21

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy all-404-redirect-to-homepage || rpm -q all-404-redirect-to-homepage || all-404-redirect-to-homepage --version

2. UPGRADE to 1.21 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade all-404-redirect-to-homepage

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade all-404-redirect-to-homepage

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-2021-24326?

all 404 redirect to homepage: upgrade to 1.21. Exact commands for each OS are on this page.

Is CVE-2021-24326 being exploited?

CVE-2021-24326 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-2021-24326 affect?

CVE-2021-24326 affects all 404 redirect to homepage. Severity is medium (CVSS 5.4). The tab parameter of the settings page of the All 404 Redirect to Homepage WordPress plugin before 1.21 was vulnerable to an authenticated reflected Cross-Site Scripting (XSS) issue as user input was not properly sanitised before being outp

How urgent is CVE-2021-24326?

Priority 36/100. Public exploit reference

Software pages

WordPress vulnerabilities

Related CVEs

CVE-2021-24324 MEDIUM 6.5 UPGRADE The 404 SEO Redirection WordPress plugin through 1.3 is lacking CSRF checks in all its settings, allowing atta

References

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