Fileviewer <= 2.2 - Arbitrary File Upload/Deletion via CSRF

published 2021-09-13 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-11403

cvss: 8.8; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.7%; EPSS 0.7% chance of exploitation in 30 days, percentile 53%
public exploits: 0; none known

The Fileviewer WordPress plugin through 2.2 does not have CSRF checks in place when performing actions such as upload and delete files. As a result, attackers could make a logged in administrator delete and upload arbitrary files via a CSRF attack

Exploit prediction

0.71% chance of exploitation in the next 30 days, higher than 53% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

wpscan.com https://wpscan.com/vulnerability/ddd37827-f4c1-4806-8846-d06d9fbf23dd referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD	2.0	6.8	AV:N/AC:M/Au:N/C:P/I:P/A:P

Affected products

Unknown Fileviewer

Classification

Weakness

CWE-352 Cross-Site Request Forgery

Technology feeds

WordPress rss critical rss

References

wpscan.com /vulnerability/ddd37827-f4c1-4806-8846-d06d9fbf23dd
exploit, third-party-advisory

Sources

CVE List CVE-2021-24491
NVD CVE-2021-24491

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.

Summary