Security readout for executives and security teams
Plain-English summary
CVE-2026-2890 affects the Formidable Forms WordPress plugin payment flow. A payment can be marked complete based on Stripe PaymentIntent status without confirming the charged amount matches the expected amount. This could let someone underpay while receiving goods or services. No provided source confirms active exploitation.
Executive priority
Treat as high priority for revenue-generating WordPress sites using Formidable Forms payments. The main business risk is payment undercollection or fulfillment without proper payment. Prioritize inventory, reconciliation, and vendor-directed remediation.
Technical view
Formidable Forms through version 6.28 has a Stripe Link payment integrity issue. The return handler relies on PaymentIntent status, and intent verification reportedly does not bind the intent to the specific form or action. The issue is classified as CWE-862 with CVSS 7.5, network exploitable, unauthenticated, low complexity, and high integrity impact.
Likely exposure
WordPress sites using Formidable Forms versions up to and including 6.28 with Stripe Link or related one-time payment workflows are the likely exposure. Sites not using Formidable Forms payments are less likely to be materially affected.
Exploitation context
The public description says an unauthenticated attacker could reuse a completed low-value PaymentIntent to mark a higher-value payment complete. The source bundle does not include proof of active exploitation, and CISA KEV status is false.
Researcher notes
The source bundle identifies relevant plugin code locations and describes missing binding between PaymentIntent validation and specific form actions. Evidence is sufficient for exposure triage, but official fix details and exploitation-in-the-wild evidence are not included.
Mitigation direction
- Inventory WordPress sites using Formidable Forms and identify versions up to 6.28.
- Check vendor and Wordfence guidance for a fixed version or official mitigation.
- Prioritize updating the plugin if a vendor-fixed release is available.
- Temporarily suspend affected Stripe Link payment workflows if business risk is unacceptable.
- Manually reconcile completed Formidable payments against Stripe charged amounts.
Validation and detection
- Confirm installed Formidable Forms version on each WordPress site.
- Identify forms using Stripe Link or one-time Stripe payment handling.
- Review recent completed payments for amount mismatches against Stripe records.
- Check whether payment completion depends only on PaymentIntent status.
- Monitor vendor advisories for updated affected and fixed version details.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-862: Authorization and privilege behavior lookup
Authorization weaknesses can support privilege escalation and valid-account review, depending on exploit path. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCredential and access behavior lookup
The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-2890 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 7.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N3.93.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.5HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://www.wordfence.com/threat-intel/vulnerabilities/id/ebb4bc5a-9469-4733-acf3-d2dda5edb7af?source=cveCVE reference
- https://plugins.trac.wordpress.org/browser/formidable/tags/6.28/stripe/controllers/FrmStrpLiteLinkController.php#L429CVE reference
- https://plugins.trac.wordpress.org/browser/formidable/tags/6.28/stripe/controllers/FrmStrpLiteHooksController.php#L92CVE reference
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Missing Authorization
Missing Authorization represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.