CVE-2026-8871Formidable Kinetic <= 1.1.01 - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode Attributes
Updated under an hour ago ()
Does this affect you?
It affects thomstark Formidable Kinetic. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
Do this next
Free account, 1 product
The Formidable Kinetic plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'kinetic_link' shortcode in versions up to, and including, 1.1.01. This is due to insufficient input sanitization and output escaping on user-supplied shortcode attributes (notably 'window', 'class', and 'label') in the FrmKinetic::link() function, which are concatenated directly into HTML attributes of an anchor tag. 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.
- CVSS
- 6.4 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
- Weakness (CWE)
- CWE-79
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Wordfence
- NVD analysis
- Deferred
- Record last updated
- May 27, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
thomstark Formidable Kinetic thomstark:formidable_kinetic (from the name) | through 1.1.01 | CNA record |
References
- https://www.wordfence.com/threat-intel/vulnerabilities/id/6f849ec6-1c90-4f98-a367-fea87ddc5870?source=cve
- https://plugins.trac.wordpress.org/browser/formidable-kinetic/trunk/formidable-kinetic.php#L70
- https://plugins.trac.wordpress.org/browser/formidable-kinetic/trunk/formidable-kinetic.php#L34
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.