CVE-2024-3558 json
Custom Field Suite <= 2.6.7 - Authenticated (Contributor+) Stored Cross-Site Scripting via cfs[post_title]
published 2024-06-20 2 y ago modified 2026-06-17 4 mo ago also EUVD-2024-32144
- cvss
- 6.4
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 35%
- public exploits
- 0
- none known
Summary
The Custom Field Suite plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the the 'cfs[post_title]' parameter versions up to, and including, 2.6.7 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 2 y ago
Exploit prediction
0.41% chance of exploitation in the next 30 days, higher than 35% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- mgibbs189.github.io https://mgibbs189.github.io/custom-field-suite/ 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
- mgibbs189 Custom Field Suite
- custom_field_suite_project custom_field_suite
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
- Technology feeds
References
-
mgibbs189.github.io
/custom-field-suite/
exploit
-
wordfence.com
/threat-intel/vulnerabilities/id/8e4dc6fd-4bd5-4ed1-ade0-cf2f8831fac3?source=cve
third-party-advisory
-
github.com
/mgibbs189/custom-field-suite/blob/963dfcede18ff4ad697498556d9058db07d74fa3/includes/field_group.php#L20
product
-
github.com
/mgibbs189/custom-field-suite/blob/963dfcede18ff4ad697498556d9058db07d74fa3/includes/form.php#L64
product
-
github.com
/mgibbs189/custom-field-suite/blob/963dfcede18ff4ad697498556d9058db07d74fa3/includes/api.php#L282
product
-
github.com
/WordPress/WordPress/blob/22d95abc55824e83904dc0fef290464b6bec7708/wp-admin/includes/template.php#L1384
product
-
en-gb.wordpress.org
/plugins/custom-field-suite/
product
-
core.trac.wordpress.org
/ticket/56655
issue-tracking
Sources
- CVE List CVE-2024-3558
- NVD CVE-2024-3558
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.