EUVD-2026-42797
GHSA-6vjw-3rm9-r84x
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Remote unauthenticated tampering of a single request field (AV:N/AC:L/PR:N/UI:N); impact is limited to transaction/price integrity with no data or availability effect, so I:L, C:N, A:N.
Primary rating from Vendor (wordfence).
CVSS VectorVendor: wordfence
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Lifecycle Timeline
2DescriptionCVE.org
The SureForms - Drag and Drop Form Builder for WordPress plugin for WordPress is vulnerable to Improper Input Validation in all versions up to, and including, 2.2.1. This is due to the plugin accepting the payment amount directly from user-controlled POST data in the 'create_payment_intent' and 'create_subscription_intent' functions without validating it against the form's configured price. This makes it possible for unauthenticated attackers to modify the payment amount to any arbitrary value when submitting a Stripe payment form, potentially purchasing products or services at significantly reduced prices.
AnalysisAI
Payment amount tampering in the SureForms WordPress plugin (versions ≤ 2.2.1) lets unauthenticated attackers submit arbitrary prices when completing Stripe checkout. Because the 'create_payment_intent' and 'create_subscription_intent' handlers trust the amount supplied in user-controlled POST data instead of the form's server-side configured price, an attacker can purchase products or subscriptions for a fraction of their real cost. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Requires that the target WordPress site runs SureForms ≤ 2.2.1 with an active, published form using the Stripe payment integration (one-time payments via create_payment_intent or recurring via create_subscription_intent) and a valid Stripe account processing live charges. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 base score of 7.5 derives entirely from an integrity impact (I:H) under a fully remote, unauthenticated, low-complexity vector (AV:N/AC:L/PR:N/UI:N), with no confidentiality or availability impact. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker browses to a public SureForms checkout page selling, say, a $500 product, then intercepts or replays the payment submission and changes the amount field in the create_payment_intent POST body to $1 before it reaches the server. WordPress relays the attacker-chosen amount to Stripe, the low charge succeeds, and the order is recorded as paid - netting the product or subscription at a fraction of its price. … |
| Remediation | Vendor-released patch: update SureForms to version 2.2.2 or later, which enforces the server-side configured price when creating Stripe payment and subscription intents (see WordPress changeset 3427656 at https://plugins.trac.wordpress.org/changeset/3427656/sureforms/ and the Wordfence advisory at https://www.wordfence.com/threat-intel/vulnerabilities/id/8b0e0f22-de42-4da9-a0c1-ae41ba57be03). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Inventory all WordPress installations using SureForms plugin and identify current versions; disable checkout functionality if running version 2.2.1 or earlier and unable to patch immediately. …
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Same weakness CWE-20 – Improper Input Validation
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