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TI-2026-13936 Aliases CVE-2026-16734GHSA-8673-2q96-2vmf

Stripe Payment Forms by WP Full Pay < 8.5.2 - Unauthenticated Payment Intent Amount Manipulation

Priority HIGH 72CWE-862Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
None · High · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-862.

Summary

The Stripe Payment Forms by WP Full Pay WordPress plugin before 8.5.2 does not verify that the caller owns the Stripe payment intent referenced by two unauthenticated payment-form AJAX actions, allowing an unauthenticated visitor — using a nonce that is embedded in every public page containing a payment form — to change the amount of a payment intent that the Stripe Payment Forms by WP Full Pay WordPress plugin before 8.5.2 then updates server-side through the Stripe API with the store's secret key. An ownership check added in 8.5.0 was applied to only one payment-intent handler, leaving the pricing-recalculation and payment-intent-update actions unprotected against amount manipulation.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00346 28th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix Fixed Stripe Payment Forms by WP Full Pay (Unknown): 8.5.2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
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

VendorProductAffected versionsFixed inStatusSource
UnknownStripe Payment Forms by WP Full Paybefore 8.5.28.5.2Patch availableCNA
  • Stripe Payment Forms by WP Full Pay VendorUnknown Affected before 8.5.2 Fixed in 8.5.2 Patch available CNA

Remediation

  • Fix · CNA Stripe Payment Forms by WP Full Pay (Unknown) Fixed in 8.5.2

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-16734
  2. 2026-10-03 Alias added: GHSA-8673-2q96-2vmf

References

Exploit 1

Sources

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