CVE-2026-9848: WP Ticket Plugin SQL Injection Flaw

CVE-2026-9848 Overview

CVE-2026-9848 is an unauthenticated SQL injection vulnerability in the WP Ticket plugin for WordPress, affecting all versions up to and including 6.0.4. The flaw resides in the plugin's handling of the WordPress search query parameter (s) on front-end search requests. The plugin concatenates the raw user-supplied search value into a SQL LIKE clause inside a UNION sub-SELECT without using $wpdb->prepare() or proper escaping. Attackers can inject additional SQL queries to extract sensitive data from the WordPress database. This issue is tracked under CWE-89 (Improper Neutralization of Special Elements used in an SQL Command).

Critical Impact
Unauthenticated attackers can extract sensitive information from the WordPress database, including user credentials, session tokens, and configuration data, via a crafted search query.

Affected Products

WP Ticket plugin for WordPress, versions up to and including 6.0.4
WordPress installations using the wp_ticket_com_posts_request() hook on posts_request
Front-end search functionality of any site with the vulnerable plugin enabled

Discovery Timeline

2026-06-13 - CVE-2026-9848 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2026-9848

Vulnerability Analysis

The WP Ticket plugin registers wp_ticket_com_posts_request() against WordPress's posts_request filter. On unauthenticated front-end search requests, this function calls emd_author_search_results(), which reads $query->query_vars['s'] and concatenates the value directly into a SQL LIKE clause. The clause is embedded inside a UNION sub-SELECT that is appended to the main WordPress query before execution. Because WP_Query::parse_query() has already called wp_unslash() on the query variable, the standard wp_magic_quotes protection layer has been stripped before the value reaches the vulnerable code path.

The vulnerability is network-reachable and requires no authentication or user interaction. Successful exploitation discloses database contents but does not, by itself, modify data or impact availability. See the Wordfence Vulnerability Analysis for additional technical commentary.

Root Cause

The root cause is missing parameterization. The plugin builds a SQL fragment using string concatenation with attacker-controlled input rather than using $wpdb->prepare() or esc_sql(). Compounding this, the input has already been unslashed by WordPress core before the plugin handles it, so no residual escaping protects the query. Reviewers can examine the vulnerable concatenation in WP Ticket common-functions.php line 164 and line 174, with related filter wiring in filter-functions.php and query-filters.php.

Attack Vector

An unauthenticated remote attacker issues an HTTP GET request to the WordPress front-end search endpoint with a crafted s parameter. The attacker appends SQL payloads designed to break out of the LIKE clause and inject a UNION-based query that selects from sensitive tables such as wp_users or wp_options. The response body or error output is then used to exfiltrate data. Because the request targets a public endpoint, no session, cookie, or interactive step is required.

The vulnerability mechanism is described above in prose. No verified public proof-of-concept code is referenced in the enriched data, so no exploit snippet is reproduced here. Refer to the WordPress changeset that fixes the issue for the precise code paths involved.

Detection Methods for CVE-2026-9848

Indicators of Compromise

HTTP requests to /?s= containing SQL keywords such as UNION, SELECT, SLEEP(, BENCHMARK(, or INFORMATION_SCHEMA
Search requests with abnormally long s parameters or URL-encoded quote characters (%27, %22)
Database error messages or unusual response sizes returned from the WordPress search endpoint
Outbound DNS or HTTP callbacks originating from the database host during search request handling

Detection Strategies

Inspect web server access logs for s= parameters containing SQL metacharacters and grouping keywords
Deploy WAF rules that flag UNION-based and time-based SQL injection signatures against WordPress search endpoints
Correlate spikes in search traffic from a single IP with subsequent database query latency anomalies
Audit installed WordPress plugins for the WP Ticket plugin at version 6.0.4 or earlier using wp plugin list

Monitoring Recommendations

Forward Apache, Nginx, and WordPress debug logs to a centralized analytics platform for query parameter inspection
Enable MySQL/MariaDB general query logging in staging to baseline legitimate search-derived queries
Alert on repeated 500-class responses from /index.php originating from the same source IP within short time windows
Monitor for new administrator accounts, password hash reads, or unexpected wp_options queries following suspicious search activity

How to Mitigate CVE-2026-9848

Immediate Actions Required

Update the WP Ticket plugin to version 6.0.5 or later, which contains the upstream fix
If the plugin cannot be updated immediately, deactivate and remove it from all affected WordPress installations
Rotate WordPress administrator passwords and force re-authentication for all privileged users
Review database audit logs for evidence of data exfiltration during the exposure window

Patch Information

The vendor released a fix in WP Ticket version 6.0.5. The corrective change is captured in WordPress Changeset #3565099, and the full diff between vulnerable and patched releases is available in the 6.0.4 to 6.0.5 changeset comparison. Administrators should validate the installed version using wp plugin get wp-ticket --field=version after applying the update.

Workarounds

Deploy a WAF rule that blocks SQL metacharacters in the s query parameter on WordPress endpoints
Restrict access to front-end search functionality via authentication or IP allow-listing until patching is complete
Disable the WP Ticket plugin's posts_request hook by removing the filter in a custom mu-plugin as a temporary measure

bash

# Configuration example: update the WP Ticket plugin using WP-CLI
wp plugin update wp-ticket --version=6.0.5
wp plugin get wp-ticket --field=version