CVE-2026-57810 Overview
CVE-2026-57810 is a blind SQL injection vulnerability affecting the APIExperts Square for WooCommerce WordPress plugin (woosquare) developed by Saad Iqbal. The flaw stems from improper neutralization of special elements in an SQL command [CWE-89]. All versions up to and including 4.7.4 are affected. An authenticated attacker with low privileges can inject arbitrary SQL queries into the underlying database over the network. The scope is changed, meaning the vulnerability can impact resources beyond the vulnerable component.
Critical Impact
Authenticated attackers can execute blind SQL injection against WordPress sites running vulnerable versions of the woosquare plugin, exposing confidential database contents including customer and payment data.
Affected Products
- APIExperts Square for WooCommerce plugin (woosquare) versions up to and including 4.7.4
- WordPress sites integrating Square payments via the affected plugin
- WooCommerce-based e-commerce deployments using woosquare
Discovery Timeline
- 2026-07-13 - CVE-2026-57810 published to NVD
- 2026-07-13 - Last updated in NVD database
Technical Details for CVE-2026-57810
Vulnerability Analysis
The vulnerability is a blind SQL injection classified under [CWE-89], Improper Neutralization of Special Elements used in an SQL Command. The woosquare plugin fails to properly sanitize or parameterize user-supplied input before incorporating it into SQL queries executed against the WordPress database. Because the injection is blind, the attacker cannot observe direct query output in the HTTP response. Instead, an attacker infers data by observing boolean or time-based response differences.
The Exploit Prediction Scoring System places CVE-2026-57810 in a moderate exploitation likelihood range based on public data available at publication. No public proof-of-concept exploit or active exploitation has been reported at the time of writing.
Root Cause
The root cause is the concatenation of untrusted input into SQL statements without the use of prepared statements or the WordPress $wpdb->prepare() API. When plugin code passes request parameters directly into database queries, an attacker with a valid low-privileged account can break out of the intended query context.
Attack Vector
Exploitation occurs over the network against the WordPress site hosting the vulnerable plugin. The attacker must hold an authenticated account with low privileges, such as a subscriber or customer role. Once authenticated, the attacker sends crafted HTTP requests containing SQL payloads to plugin endpoints that reach the vulnerable query path. Successful exploitation permits extraction of arbitrary database contents through blind inference techniques such as boolean-based or time-based payloads.
No verified exploitation code is publicly available. Refer to the Patchstack WordPress Plugin Advisory for additional technical detail.
Detection Methods for CVE-2026-57810
Indicators of Compromise
- HTTP requests to woosquare plugin endpoints containing SQL metacharacters such as ', --, UNION, SLEEP(, or BENCHMARK(.
- Unusually long response times on plugin endpoints, indicative of time-based blind SQL injection probes.
- Repeated authenticated requests from a single low-privileged account targeting the same plugin endpoint with varying payloads.
- WordPress database error entries in PHP error logs referencing plugin-invoked queries.
Detection Strategies
- Deploy a web application firewall rule set that flags SQL injection signatures on WordPress admin-ajax and REST endpoints exposed by woosquare.
- Correlate authentication events with subsequent anomalous request patterns to identify low-privileged accounts probing plugin endpoints.
- Enable WordPress query logging or a database activity monitor to identify unusual SELECT, UNION, or timing-based queries originating from plugin code.
Monitoring Recommendations
- Monitor WordPress access logs for repeated POST or GET requests to woosquare endpoints containing encoded SQL syntax.
- Track outbound query latency and alert on statistically anomalous execution times tied to plugin request handlers.
- Audit new low-privileged account registrations followed by rapid plugin endpoint access.
How to Mitigate CVE-2026-57810
Immediate Actions Required
- Identify all WordPress installations running the APIExperts Square for WooCommerce plugin at version 4.7.4 or earlier.
- Deactivate the woosquare plugin until a patched version is installed if the plugin is not business-critical.
- Restrict new user registration and audit existing low-privileged accounts for suspicious activity.
- Rotate database credentials and WordPress secret keys if compromise is suspected.
Patch Information
At the time of publication, review the Patchstack WordPress Plugin Advisory for the latest fixed version and vendor guidance. Upgrade to the version identified as remediated by Saad Iqbal / APIExperts once available.
Workarounds
- Apply virtual patching through a WordPress-aware web application firewall to block SQL injection payloads targeting woosquare endpoints.
- Enforce least privilege by disabling account self-registration and removing unnecessary low-privileged accounts.
- Restrict access to the WordPress admin surface and plugin endpoints by IP allowlisting where feasible.
- Enable database user privilege separation so the WordPress database account cannot execute schema modifications or read unrelated tables.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
