CVE-2026-101335
Forminator Forms <= 1.58.1 - Unauthenticated Arbitrary Shortcode Execution via 'User-Agent' Header and 'referer_url' Parameter via Quiz Notification Merge Tags
- 6.5MediumCVSS base score
- 0.28%Exploitation in 30 daysEPSS · top 79% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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.
Timeline
ID reserved
By Wordfence
- 18 days later
· 18 days later
Published
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| WordfenceCNA (assigner) | 3.1 | Medium6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N |
| NVDNVD · Deferred | 3.1 | Medium6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N |
- EPSS (exploitation in 30 days)
- 0.28% · top 79% of all CVEs (11 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.5.
Affected products
wpmudev · Forminator Forms – Contact Form, Payment Form & Custom Form Builder
- affected ≤ 1.58.1
References
References7
- https://www.wordfence.com/threat-intel/vulnerabilities/id/27640d44-1474-416a-8efd-e9524f9d3c7f?source=cve (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/forminator/tags/1.57.3/library/helpers/helper-fields.php#L2965 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/forminator/tags/1.57.3/library/helpers/helper-fields.php#L1652 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/forminator/tags/1.57.3/library/helpers/helper-fields.php#L1476 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/forminator/tags/1.57.3/library/modules/quizzes/front/front-mail.php#L36 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/forminator/tags/1.57.3/library/abstracts/abstract-class-front-action.php#L127 (opens in a new tab)
- https://plugins.trac.wordpress.org/changeset?reponame=&old=3745883%40forminator&new=3745883%40forminator (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-102637 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-101335)Record last updated .