$ cve CVE-2021-24884 JSON

CVE-2021-24884

9.6

CRITICAL · CVSS 3.1 · EPSS 3.1% (pctl 88)

In your normal cycle

Critical by CVSS (9.6), but no sign of active exploitation.

Description

The Formidable Form Builder WordPress plugin before 4.09.05 allows to inject certain HTML Tags like <audio>,<video>,<img>,<a> and<button>.This could allow an unauthenticated, remote attacker to exploit a HTML-injection byinjecting a malicous link. The HTML-injection may trick authenticated users to follow the link. If the Link gets clicked, Javascript code can be executed. The vulnerability is due to insufficient sanitization of the "data-frmverify" tag for links in the web-based entry inspection page of affected systems. A successful exploitation incomibantion with CSRF could allow the attacker to perform arbitrary actions on an affected system with the privileges of the user. These actions include stealing the users account by changing their password or allowing attackers to submit their own code through an authenticated user resulting in Remote Code Execution. If an authenticated user who is able to edit Wordpress PHP Code in any kind, clicks the malicious link, PHP code can be edited.

Scoring

CVSS	9.6 (CRITICAL, v3.1)
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
EPSS	3.13% — more likely to be exploited than 88% of all CVEs
Weakness	CWE-79
On CISA KEV	no
Public exploit	none known
Published	2021-10-25
Last modified	2026-06-17

Affected (1)

Vendor	Product
strategy11	formidable form builder

References

→ the Explorer · watch your stack · NVD