Improper signature verification in jconti Payment Gateway for Redsys & WooCommerce Lite
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
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-347.
Summary
The Payment Gateway for Redsys & WooCommerce Lite plugin for WordPress is vulnerable to Improper Verification of Cryptographic Signature in versions up to, and including, 7.0.0 due to successful_request() handlers calculating a local signature but not validating Ds_Signature from the request before accepting payment status across the Redsys, Bizum, and Google Pay gateway flows. This makes it possible for unauthenticated attackers to forge payment callback data and mark pending orders as paid when they know a valid order key and order amount, potentially allowing checkout completion and product or service fulfillment without a successful payment.
Why it matters now
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
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-5050
- 2026-10-03 Alias added: GHSA-6pcx-jf98-3w2h
References
More jconti vulnerabilities
- TI-2025-05352 Link Shield <= 0.5.4 - Cross-Site Request Forgery to Stored Cross-Site Scripting CVSS 3.1MEDIUM 6.1
- TI-2026-05647 Cross-site scripting in jconti VideoZen CVSS 3.1MEDIUM 4.4
Sources
- CVE-2026-5050 · CVE Program
- CVE-2026-5050 · NVD
- FIRST EPSS
- GHSA-6pcx-jf98-3w2h · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences