404 SEO Redirection vulnerabilities
Plugin slug 404-redirection-manager · 3 known vulnerabilities · latest disclosed 2026-06-15 · WordPress.org page
1 vulnerability has no fixed version yet. If you use this plugin, consider disabling or replacing it until a fix is released.
2 of 3 rated high or critical (CVSS 7 or more).
Known vulnerabilities in 404 SEO Redirection
| Severity | Affected versions | Fixed in | CVE | Published | Details |
|---|---|---|---|---|---|
| High 7.5 | <= 1.0 | No fix yet | CVE-2016-20071 | 2026-06-15 | Advisory |
| Medium 6.1 | <= 1.3 | 1.4 | CVE-2021-24325 | 2021-04-16 | Advisory |
| High 8.8 | <= 1.3 | 1.4 | CVE-2021-24324 | 2021-04-16 | Advisory |
Check if a site is affected
Enter a site address to see which version of 404 SEO Redirection and other plugins it runs, and whether they match a known vulnerability.
Questions
Is the 404 SEO Redirection plugin safe to use?
1 known issue(s) have no fix yet, so check the table above before using it.
How do I check which version of 404 SEO Redirection my site runs?
In WordPress go to Plugins > Installed Plugins. From the outside, the free PluginPeek scan below reads the version from the site's public files.
How do I fix a vulnerable plugin?
Make a full backup, then update it from Dashboard > Updates and check the site afterwards. If you would rather not, we can do it for a fixed $99, paid after you have checked the site.