CVE-2021-4338 json
404 to 301 <= 3.0.7 - Missing Authorization to Redirect Creation
published 3y ago modified 4mo ago also EUVD-2021-34165
- cvss
- 6.4
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 49%
- public exploits
- 0
- none known
Summary
The 404 to 301 plugin for WordPress is vulnerable to authorization bypass due to missing capability checks on the open_redirect & save_redirect functions in versions up to, and including, 3.0.7. This makes it possible for authenticated attackers to view, create and edit redirections.
Patch / fix
Is CVE-2021-4338 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- last yr.
Exploit prediction
0.62% chance of exploitation in the next 30 days, higher than 49% of all scored CVEs (FIRST EPSS, 2026-11-09).
Exploits and checks
- blog.nintechnet.com https://blog.nintechnet.com/broken-access-control-vulnerability-fixed-in-wordpress-404-to-301-plugin/ referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N |
| NVD | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N |
Affected products
- joelcj91 404 to 301 – Redirect, Log and Notify 404 Errors
Classification
- Weakness
- Technology feeds
References
-
plugins.trac.wordpress.org
/changeset/2546695/404-to-301
patch
-
blog.nintechnet.com
/broken-access-control-vulnerability-fixed-in-wordpress-404-to-301-plugin/
exploit
-
wordfence.com
/threat-intel/vulnerabilities/id/05d6b27f-b1e5-4bb8-b7db-f8295a5e0d5b?source=cve
third-party-advisory
-
wpscan.com
/vulnerability/9f147107-bc5a-4a01-9979-cd9e16061f12
third-party-advisory
-
acunetix.com
/vulnerabilities/web/wordpress-plugin-404-to-301-redirect-log-and-notify-404-errors-security-bypass-3-0-7/
third-party-advisory
Sources
- CVE List CVE-2021-4338
- NVD CVE-2021-4338
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