CVE-2025-59136: 
WordPress vulnerability analysis and mitigation

CVE-2025-59136 is a Sensitive Data Exposure vulnerability (CWE-201: Insertion of Sensitive Information Into Sent Data) affecting the Efí Bank Gerencianet Oficial WordPress plugin (woo-gerencianet-official). The vulnerability allows unauthenticated remote attackers to retrieve embedded sensitive data transmitted by the plugin. All versions through 3.1.3 are affected. It was reported by researcher Legion Hunter on October 18, 2025, and publicly disclosed by Patchstack on December 31, 2025. The CVSS v3.1 base score is 5.3 (Medium) (Patchstack).

The vulnerability is classified as CWE-201 (Insertion of Sensitive Information Into Sent Data), meaning the plugin inadvertently includes sensitive data within network transmissions that can be intercepted or retrieved by unauthorized parties. No authentication is required to exploit this flaw, and the attack vector is network-accessible with low complexity. The issue maps to OWASP Top 10 category A3: Sensitive Data Exposure. No detailed technical write-up or proof-of-concept code has been publicly released beyond the Patchstack advisory (Patchstack).

Successful exploitation allows an unauthenticated attacker to retrieve sensitive information embedded in data sent by the plugin — information that would not normally be accessible to regular users. The confidentiality impact is rated Low, with no integrity or availability impact. While the immediate impact is limited, exposed sensitive data (such as API credentials or configuration details) could be leveraged to facilitate further attacks against the WooCommerce store or its payment infrastructure (Patchstack).

No active in-the-wild exploitation has been reported, and no exploit code is publicly available. The EPSS score is approximately 0.028% (0.000280), indicating a very low probability of exploitation in the near term. The vulnerability is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog. Patchstack notes the issue has a low priority and is unlikely to be exploited, though it acknowledges that vulnerabilities of this class are sometimes used in mass-exploit campaigns targeting WordPress sites at scale (Patchstack). A Nuclei detection template was added to the ProjectDiscovery nuclei-templates repository in mid-2026, enabling automated scanning for this vulnerability (Nuclei Templates).

1. Reconnaissance: Identify WordPress sites running the Gerencianet Oficial plugin (woo-gerencianet-official) version 3.1.3 or earlier using tools such as WPScan, Shodan, or the ProjectDiscovery Nuclei scanner with the available detection template.
2. Probe plugin endpoints: Send unauthenticated HTTP requests to plugin-exposed endpoints or observe network responses from the WooCommerce checkout/payment flow that involve the Gerencianet plugin.
3. Retrieve sensitive data: Analyze the HTTP responses for embedded sensitive information (e.g., API keys, credentials, or configuration parameters) that the plugin inadvertently includes in transmitted data.
4. Leverage exposed data: Use any retrieved credentials or API keys to access the Efí Bank/Gerencianet payment gateway account or pivot to further attacks against the affected WooCommerce store (Patchstack).

• Network: Unusual or repeated unauthenticated HTTP requests to WooCommerce/Gerencianet plugin endpoints from unfamiliar IP addresses; automated scanning patterns consistent with mass WordPress plugin enumeration.
• Logs: WordPress access logs showing high-frequency requests to plugin-specific URLs (e.g., paths containing woo-gerencianet) from single or rotating IP addresses without corresponding user sessions.
• File System: Presence of Nuclei scan artifacts or automated scanner user-agent strings (e.g., nuclei) in web server access logs targeting plugin endpoints.

As of the disclosure date (December 31, 2025), Patchstack indicated no official patch was available from the plugin developer. The Feedly intelligence notes that a fix is available in version 3.1.4 and later — site administrators should update the plugin to version 3.1.4 or higher immediately. If an update is not possible, consider deactivating the plugin until a patch is applied, or use a web application firewall (WAF) such as Patchstack's virtual patching to block exploitation attempts in the interim (Patchstack).

The vulnerability was discovered by independent researcher Legion Hunter and reported through Patchstack's vulnerability disclosure program. Patchstack classified it as low priority with no impactful threat, and early warnings were sent to Patchstack customers on December 31, 2025. A Bluesky post referencing the CVE was noted in June 2026, and the addition of a Nuclei detection template in mid-2026 indicates some community interest in automated detection (Nuclei Templates). No significant vendor statements or broader media coverage have been identified.