CVE-2021-4359 json
Frontend File Manager Plugin <= 18.2 - Unauthenticated Arbitrary Post Deletion
published 2023-06-07 3 y ago modified 2026-06-17 4 mo ago also EUVD-2021-34186
- cvss
- 6.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.9%
- EPSS 0.9% chance of exploitation in 30 days, percentile 59%
- public exploits
- 0
- none known
Summary
The Frontend File Manager plugin for WordPress is vulnerable to Unauthenticated Arbitrary Post Deletion in versions up to, and including, 18.2. This is due to lacking authentication protections and lacking a security nonce on the wpfm_delete_file AJAX action. This makes it possible for unauthenticated attackers to delete any posts and pages on the site.
Patch / fix
- nmedia Frontend File Manager Plugin 18.3
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 22 mo ago
Exploit prediction
0.88% chance of exploitation in the next 30 days, higher than 59% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- blog.nintechnet.com https://blog.nintechnet.com/wordpress-frontend-file-manager-plugin-fixed-multiple-critical-vulnerabilities/ referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L |
| NVD | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |
Affected products
- nmedia Frontend File Manager Plugin
Classification
- Weakness
-
- CWE-862 Missing Authorization
- Technology feeds
References
-
plugins.trac.wordpress.org
/changeset?sfp_email=&sfph_mail=&reponame=&old=2554359%40nmedia-user-file-uploader&new=2554359%40nmedia-user-f
patch
-
blog.nintechnet.com
/wordpress-frontend-file-manager-plugin-fixed-multiple-critical-vulnerabilities/
exploit
-
wordfence.com
/threat-intel/vulnerabilities/id/84c61d00-20c1-4176-a74d-ea6ff6220f26?source=cve
third-party-advisory
Sources
- CVE List CVE-2021-4359
- NVD CVE-2021-4359
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.