Custom Content Shortcode < 4.0.2 - Authenticated Arbitrary File Access / LFI

published 2022-03-07 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-11737

cvss: 4.3; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.4%; EPSS 0.4% chance of exploitation in 30 days, percentile 38%
public exploits: 0; none known

The Custom Content Shortcode WordPress plugin before 4.0.2 does not validate the data passed to its load shortcode, which could allow Contributor+ (v < 4.0.1) or Admin+ (v < 4.0.2) users to display arbitrary files from the filesystem (such as logs, .htaccess etc), as well as perform Local File Inclusion attacks as PHP files will be executed. Please note that such attack is still possible by admin+ in single site blogs by default (but won't be when either the unfiltered_html or file_edit is disallowed)

Patch / fix

fixed in 1

custom_content_shortcode_project custom_content_shortcode 4.0.2

Exploit prediction

0.44% chance of exploitation in the next 30 days, higher than 38% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

wpscan.com https://wpscan.com/vulnerability/be9d6f82-c972-459a-bacf-65b3dfb11a09 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.1	4.3	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
NVD	2.0	4.0	AV:N/AC:L/Au:S/C:P/I:N/A:N

Affected products

Unknown Custom Content Shortcode

Classification

Weakness

CWE-345 Insufficient Verification of Data Authenticity

Technology feeds

WordPress rss critical rss

References

wpscan.com /vulnerability/be9d6f82-c972-459a-bacf-65b3dfb11a09
exploit, third-party-advisory

Sources

CVE List CVE-2021-24825
NVD CVE-2021-24825

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