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CVE-2026-78260 – Unauthenticated SQL Injection – Epayco WordPress Plugin (<= 8.4.6)

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Summary

CVE-2026-78260 is an unauthenticated SQL injection vulnerability (CWE-89) in the Epayco payment gateway plugin for WordPress, affecting versions up to and including 8.4.6. The flaw allows a remote, unauthenticated attacker to inject SQL via the plugin’s blind SQL injection vector (CAPEC-7), with no user interaction required. It carries a CRITICAL CVSS v3.1 base score of 9.3.

Technical details

  • Root cause: The Epayco plugin fails to properly neutralize special elements used in SQL commands, resulting in a SQL injection vulnerability (CWE-89).
  • Trigger conditions: Exploitable without authentication and without any user interaction.
  • Attack vector: Network-based; the vulnerability can be triggered remotely over HTTP(S) against any exposed WordPress site running the affected plugin.
  • Impact: Classified as blind SQL injection (CAPEC-7); the CVSS metrics indicate high confidentiality impact and low availability impact, with a changed scope, meaning the attacker can potentially extract data beyond the vulnerable component’s normal security scope.

Affected software

  • Epayco WordPress plugin (package: epayco-gateway), versions ≤ 8.4.6
  • Fixed in version 8.4.7 and later

Severity

  • CVSS v3.1 Base Score: 9.3 (Critical)
  • Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:L

Mitigation and recommended actions

  • Immediate: Update the Epayco WordPress plugin to version 8.4.7 or later, where the SQL injection issue has been resolved.
  • If patching is not immediately possible: Restrict or monitor network access to the WordPress site’s Epayco-related endpoints, deploy a web application firewall (WAF) with SQL injection detection rules in front of the site, and audit database logs for anomalous query patterns until the patch can be applied.

References

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