CVE-2016-20072: BBS e-Franchise WordPress Plugin SQL Injection – Remote Data Exfiltration Risk

Technical summary

CVE-2016-20072 is an unauthenticated SQL injection vulnerability (CWE-89) in BBS e-Franchise 1.1.1 for WordPress. The plugin fails to sanitize user input in the `uid` parameter before passing it to SQL queries. Attackers can construct UNION-based SQL injection payloads through shortcode-enabled pages to execute arbitrary SQL, bypassing authentication entirely. The attack surface is wide since no login is required and the malicious parameter is processed through publicly accessible shortcodes.

Business impact

Exploitation enables attackers to exfiltrate sensitive user data including credentials, email addresses, and customer information from your WordPress database. Depending on your site's content, attackers may also access taxonomy terms and custom post metadata. This exposure creates risk of account takeover, identity theft, regulatory compliance violations (GDPR, PCI-DSS), reputational damage, and secondary attacks using stolen credentials across your infrastructure. The high CVSS score (8.2) reflects the ease of exploitation and severity of confidentiality impact.

Affected systems

Any WordPress installation running the BBS e-Franchise plugin version 1.1.1 is vulnerable. The flaw affects all sites using this plugin regardless of WordPress version, provided the plugin's shortcodes are active or accessible. Multi-site WordPress installations and WooCommerce stores using this plugin for franchise management are especially at risk if they process sensitive customer or user data.

Exploitability

This vulnerability is highly exploitable. It requires no authentication, no user interaction, and minimal technical complexity—attackers need only craft a malicious HTTP request with a SQL injection payload in the `uid` parameter to a page where the plugin's shortcode is present. Automated scanning and exploitation tools can readily identify and attack vulnerable instances. The CVSS vector (AV:N/AC:L/PR:N/UI:N) confirms network accessibility, low attack complexity, and zero privilege/interaction requirements.

Remediation

Immediately disable or remove the BBS e-Franchise 1.1.1 plugin from all WordPress installations. Contact the plugin vendor to determine if a patched version is available; if not, evaluate alternative franchise management plugins with security certifications. Do not re-enable the plugin until a vendor patch is confirmed and applied. Verify the update applies to version 1.1.1 specifically before deployment to production.

Patch guidance

Check the BBS e-Franchise plugin repository or vendor website for an updated version that addresses SQL injection in the `uid` parameter. Apply patches only from the official vendor or WordPress.org plugin directory. Test the patched version in a staging environment first, particularly shortcode rendering and any franchise lookup functionality. After patching, audit database logs for signs of prior exploitation. If no patch is forthcoming, permanently deactivate and remove the plugin.

Detection guidance

Monitor web server logs and WordPress access logs for requests containing SQL injection patterns in the `uid` parameter (look for keywords: UNION, SELECT, OR, --, /*, and encoded variants). Implement database query logging to identify unusual SELECT queries extracting user_login, user_email, or other sensitive columns. Use WordPress security plugins with WAF capabilities to block requests with SQL syntax in shortcode parameters. Review database access logs for timestamps correlating to any suspicious HTTP activity.

Why prioritize this

This vulnerability merits immediate patching due to its high CVSS score (8.2), lack of authentication requirement, ease of exploitation, and direct exposure of sensitive user data. The attack can be automated and deployed at scale. However, it is not currently listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, suggesting active in-the-wild exploitation may not yet be widespread—though that does not reduce the urgency of remediation given the trivial exploitation complexity.

Risk score, explained

The CVSS 3.1 score of 8.2 (HIGH) reflects: network-based attack vector (AV:N), low attack complexity requiring no special conditions (AC:L), no privileges or user interaction needed (PR:N, UI:N), confidentiality impact (C:H) from direct data exfiltration, and minimal integrity impact (I:L) from potential database modification. The unchanged scope (S:U) and lack of availability impact (A:N) prevent a critical rating, but the ease of exploitation and high sensitivity of exposed data justify the HIGH severity.

Frequently asked questions