CVE-2026-78260 Overview
CVE-2026-78260 is an unauthenticated SQL injection vulnerability affecting the Epayco payment gateway plugin for WordPress in versions <= 8.4.6. The flaw is categorized under [CWE-89], improper neutralization of special elements used in an SQL command. An attacker can reach the vulnerable code path over the network without authentication or user interaction. Successful exploitation lets an attacker inject arbitrary SQL against the WordPress database backing the plugin. The issue was published to the National Vulnerability Database (NVD) on 2026-08-27.
Critical Impact
Unauthenticated attackers can inject SQL against WordPress sites running the Epayco plugin, exposing payment-related data and enabling broader database compromise.
Affected Products
- Epayco Gateway WordPress plugin, versions <= 8.4.6
- WordPress sites processing payments through the Epayco integration
- Any deployment exposing the affected plugin endpoints to the internet
Discovery Timeline
- 2026-08-27 - CVE-2026-78260 published to NVD
- 2026-08-27 - Last updated in NVD database
Technical Details for CVE-2026-78260
Vulnerability Analysis
The vulnerability is an unauthenticated SQL injection in the Epayco Gateway WordPress plugin through version 8.4.6. The plugin accepts attacker-controlled input and passes it into a SQL statement without proper sanitization or parameterization. Because authentication is not required, any remote actor able to reach the vulnerable endpoint can trigger the flaw. The scope is marked as changed in the CVSS metrics, meaning the injection affects resources beyond the vulnerable component itself, most notably the WordPress database.
See the Patchstack advisory for the Epayco Gateway plugin for the vendor-tracked technical details.
Root Cause
The root cause is improper input neutralization ([CWE-89]). User-supplied parameters are concatenated into SQL queries executed against the WordPress database, rather than being bound as prepared-statement parameters or filtered through wpdb::prepare(). This lets attackers break out of the intended query context and append their own SQL clauses.
Attack Vector
Exploitation occurs over the network against a public WordPress site running the Epayco Gateway plugin. The attacker sends a crafted HTTP request containing SQL metacharacters to a vulnerable plugin endpoint. No credentials, session, or user interaction are required. Successful injection can be used to read sensitive rows, enumerate the schema, or chain into further impact depending on the query context.
No verified public exploit code is available at this time. Refer to the linked advisory for indicators tied to the specific vulnerable parameter.
Detection Methods for CVE-2026-78260
Indicators of Compromise
- HTTP requests to Epayco Gateway plugin endpoints containing SQL syntax such as UNION SELECT, SLEEP(, --, /*, or stacked semicolons
- Anomalous outbound traffic or DNS lookups originating from the WordPress host shortly after inbound requests to plugin URLs
- New or modified WordPress administrator accounts, options rows, or unexpected entries in wp_users and wp_usermeta
- Web server access logs showing repeated 200 responses to plugin URLs with unusually long or encoded query strings
Detection Strategies
- Deploy web application firewall (WAF) rules that block SQL injection payload patterns targeting /wp-content/plugins/epayco-gateway/ request paths
- Enable MySQL general query logging temporarily to identify malformed or attacker-shaped queries referencing plugin tables
- Correlate web access logs with database error logs to surface injection attempts that produce syntax errors
Monitoring Recommendations
- Alert on spikes in 500-series responses or query errors from the WordPress database tier
- Monitor file integrity on the WordPress install to detect webshells or plugin tampering following suspected exploitation
- Track authentication events for privileged accounts and flag unexpected password resets or role changes
How to Mitigate CVE-2026-78260
Immediate Actions Required
- Inventory all WordPress sites and identify installations of the Epayco Gateway plugin at version <= 8.4.6
- Update the Epayco Gateway plugin to the fixed version published by the vendor as tracked in the Patchstack advisory
- Rotate database credentials and any secrets stored in wp-config.php or plugin settings if exploitation is suspected
- Review WordPress user accounts, sessions, and administrator activity for signs of compromise
Patch Information
Refer to the Patchstack advisory for the Epayco Gateway plugin for the fixed release. Sites unable to update immediately should apply virtual patching at the WAF layer and restrict access to plugin endpoints.
Workarounds
- Disable the Epayco Gateway plugin until a patched version can be installed and validated
- Restrict network access to WordPress admin and plugin paths using IP allow-listing where operationally feasible
- Enforce WAF signatures that block SQL injection payloads targeting the vulnerable parameter
- Apply database least-privilege by ensuring the WordPress database user cannot execute FILE, SUPER, or cross-database operations
# Example WP-CLI commands to inventory and disable the plugin pending patch
wp plugin list --field=name,version | grep -i epayco
wp plugin deactivate epayco-gateway
wp plugin update epayco-gateway
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
