Unauthenticated payment reduction via overwritten POST data
Published Mar 13, 2026 · Updated Mar 13, 2026
Authorization bypass in Strategy11 LLC Formidable Forms 6.28 and earlier allows remote attackers to reduce Stripe PaymentIntent amounts. The frm_strp_amount AJAX handler replaces global POST data with attacker-controlled JSON, and generate_false_entry resolves those values through field shortcodes when recalculating the intent. Exposure requires a Stripe payment form with dynamic pricing and publicly available nonce data; the attacker can complete the purchase for less than the configured price.
Summary
What happened
Authorization bypass in Strategy11 LLC Formidable Forms 6.28 and earlier allows remote attackers to reduce Stripe PaymentIntent amounts. The frm_strp_amount AJAX handler replaces global POST data with attacker-controlled JSON, and generate_false_entry resolves those values through field shortcodes when recalculating the intent. Exposure requires a Stripe payment form with dynamic pricing and publicly available nonce data; the attacker can complete the purchase for less than the configured price.
The record
- CVE
- CVE-2026-2888
- Published
- Mar 13, 2026
- Updated
- Mar 13, 2026
- Vendor
- Business Directory Team
- Product
- Formidable Forms
- Classifications
- CWE-639, T1565.002
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Mar 13, 2026CVE publishedPublication date reported by the CVE source.
- Mar 13, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=* <=6.28
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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