Is there a public exploit for CVE-2026-121977?

No public exploit for CVE-2026-121977 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-121977?

CVE-2026-121977 scores CVSS 5.4 (v3.1), rated medium.

What does CVE-2026-121977 affect?

CVE-2026-121977 affects jetmonsters JetFormBuilder — Dynamic Blocks Form Builder.

5.4 Medium

The JetFormBuilder — Dynamic Blocks Form Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'note (form…

CVE-2026-121977

The JetFormBuilder — Dynamic Blocks Form Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'note (form field whose value is written to post meta note)' parameter in all versions up to, and including, 3.6.8 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. Successful exploitation requires a privileged user with the editothersposts capability to visit a form URL containing the attacker-created post ID, a delivery step the attacker controls via a crafted phishing link.

Assessment

CVSS: 5.4 (v3.1)
Severity: Medium
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 7 November 2026
Last updated: 7 November 2026
Affected: jetmonsters · JetFormBuilder — Dynamic Blocks Form Builder
Assigner: Wordfence

CVSS vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N

At the source

EUVD (ENISA)

References

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