CVE-2026-101335 json
Forminator Forms <= 1.58.1 - Unauthenticated Arbitrary Shortcode Execution via 'User-Agent' Header and 'referer_url' Parameter via Quiz Notification Merge Tags
published 24d ago modified 24d ago also EUVD-2026-102637
- cvss
- 6.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 20%
- public exploits
- 0
- none known
Summary
The Forminator Forms – Contact Form, Payment Form & Custom Form Builder plugin for WordPress is vulnerable to Arbitrary Shortcode Execution in versions up to, and including, 1.58.1. This is due to the forminator_replace_quiz_form_data() helper invoking do_shortcode() on the fully expanded notification body once the {quiz_result} merge tag has been substituted, while the earlier-substituted {user_agent} and {refer_url} merge tags carry unauthenticated attacker-controlled bytes (the User-Agent header and the referer_url POST parameter) through sanitize_text_field()/esc_html(), neither of which strip the '[' and ']' shortcode delimiters. This makes it possible for unauthenticated attackers to execute arbitrary WordPress shortcodes registered on the site by submitting a quiz whose notification template contains {quiz_result}; the resulting impact depends on the shortcodes exposed by other installed plugins/themes and can range from arbitrary content injection to information disclosure.
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Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 24d ago
Exploit prediction
0.28% chance of exploitation in the next 30 days, higher than 20% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N |
Affected products
- wpmudev Forminator Forms – Contact Form, Payment Form & Custom Form Builder
Classification
- Weakness
-
- CWE-94 Improper Control of Generation of Code
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/27640d44-1474-416a-8efd-e9524f9d3c7f?source=cve
- plugins.trac.wordpress.org /browser/forminator/tags/1.57.3/library/helpers/helper-fields.php#L2965
- plugins.trac.wordpress.org /browser/forminator/tags/1.57.3/library/helpers/helper-fields.php#L1652
- plugins.trac.wordpress.org /browser/forminator/tags/1.57.3/library/helpers/helper-fields.php#L1476
- plugins.trac.wordpress.org /browser/forminator/tags/1.57.3/library/modules/quizzes/front/front-mail.php#L36
- plugins.trac.wordpress.org /browser/forminator/tags/1.57.3/library/abstracts/abstract-class-front-action.php#L127
- plugins.trac.wordpress.org /changeset?reponame=&old=3745883%40forminator&new=3745883%40forminator
Sources
- CVE List CVE-2026-101335
- NVD CVE-2026-101335
Fencer Intel 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.