TI-2026-04347 Aliases CVE-2026-4987 GHSA-v8h4-7xcp-85r6

SureForms <= 2.5.2 - Unauthenticated Payment Amount Validation Bypass via 'form_id'

MEDIUM 41CWE-20Published 2026-03-28 · Updated 2026-04-08

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: —
Confidentiality · integrity · availability: None · High · None
Fix status: No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

The SureForms – Contact Form, Payment Form & Other Custom Form Builder plugin for WordPress is vulnerable to Payment Amount Bypass in all versions up to, and including, 2.5.2. This is due to the create_payment_intent() function performing a payment validation solely based on the value of a user-controlled parameter. This makes it possible for unauthenticated attackers to bypass configured form payment-amount validation and create underpriced payment/subscription intents by setting form_id to 0.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00955 61st percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Brainstorm Force	SureForms – Contact Form, Payment Form & Other Custom Form Builder	up to 2.5.2	—	No fix listed	CNA

SureForms – Contact Form, Payment Form & Other Custom Form Builder VendorBrainstorm Force Affected up to 2.5.2 Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2026-4987
2026-10-03 Alias added: GHSA-v8h4-7xcp-85r6

References

Other 2

TI-2025-19878 WordPress SureTriggers <= 1.0.82 - Privilege Escalation Vulnerability CVSS 3.1CRITICAL 9.8
TI-2025-02708 Incorrect comparison in Brainstorm Force OttoKit: All-in-One Automation Platform CVSS 3.1HIGH 8.1
TI-2025-05347 SureForms < 1.7.2 - Reflected XSS CVSS 3.1MEDIUM 5.8
TI-2020-18849 Spectra < 1.15.0 - Contributor+ Stored Cross-Side Scripting CVSS 3.1MEDIUM 5.4
TI-2025-03050 SureForms < 1.4.4 - Contributor+ Settings Update CVSS 3.1MEDIUM 4.9
TI-2025-11950 Starter Templates <= 4.4.41 - Authenticated (Author+) Arbitrary File Upload via WXR Upload Bypass CVSS 3.1HIGH 8.8

See all 181 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences