CVE-2026-49109: Critical vulnerability in WordPress plugin for Salesforce
According to Patchstack, the WordPress plugin „Integration for Salesforce“ has a critical vulnerability with a CVSS score of 9.8 on. The one known as CVE-2026-49109 According to reports, the vulnerability affects all versions up to and including 1.4.3 and allows attackers to perform PHP object injection without any authentication. The vulnerability was already fixed in version 1.4.4 from 2025, but the CVE documentation was not published until mid-June 2026 via Wordfence. There were no reports of active exploitation of the vulnerability at the time of disclosure.
What happened? A detailed look at the CVE-2026-49109 vulnerability
In mid-June 2026, the security firm Patchstack identified a critical vulnerability in a widely used WordPress plugin. The plugin affected is cf7-salesforce from the manufacturer CRM Perks, which enables the integration of forms such as Contact Form 7, WPForms, Elementor, Formidable, or Ninja Forms with Salesforce systems. According to Patchstack, all versions up to <= 1.4.3 vulnerable. Patchstack has assigned this vulnerability a critical CVSS score of 9.8 rated, which indicates a very high risk potential.
The particular danger of CVE-2026-49109 lies in the fact that it can be exploited by attackers remotely and without first logging in to the affected WordPress site. This opens the door to a wide range of attacks. Depending on the existing POP chain, the potential consequences can range from file deletion and the exfiltration of sensitive data to complete server takeover via remote code execution. Administrators should immediately update to version 1.4.4 or higher to protect their systems.
Technical Background: PHP Object Injection Without Authentication
The root of the vulnerability CVE-2026-49109 is an insecure deserialization of input data, which leads to a PHP object injection. Simply put, the plugin processes data coming from external sources without adequately validating its content and structure. Attackers can send specially crafted data streams to the system, which are interpreted and executed as malicious objects when processed in the server context. This mechanism allows attackers to manipulate the program logic and perform actions that were never intended by the developers.
The CVSS score according to Patchstack CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H confirms the high criticality. The identifier AV:N (Attack Vector: Network) means that the attack can be carried out over the network. PR:N (Privileges Required: None) emphasizes that no credentials or user privileges are required. Combined with the low complexity of the attack (AC:L) creates a dangerous situation for any publicly accessible website that uses a vulnerable version of the plugin. By exploiting so-called POP chains (Property-Oriented Programming)—provided such a chain exists in the target system—attackers can assemble existing code snippets in the server’s memory into a new execution chain and thus potentially execute arbitrary code.
What steps should be taken now to address CVE-2026-49109?
For the vulnerability CVE-2026-49109 A patch is available in version 1.4.4 (released in 2025). However, proactive steps to minimize risk are necessary if an immediate update is not possible. Organizations should follow a three-step approach to identify and secure affected systems.
Immediate measures: - Inventory and update: The first and most important step is to check all WordPress installations for the presence of the plugin cf7-salesforce. If an affected version (<= 1.4.3) must be updated immediately to version 1.4.4 or higher. If an immediate update is not possible, the plugin should be deactivated until then. - Check for impact: Make sure that all external and internal web projects are included in the audit, including staging and development systems.
Short-term protection: - Virtual patching: If the plugin cannot be updated or disabled immediately for operational reasons, a Web Application Firewall (WAF) should be configured with rules to defend against PHP deserialization attacks. Services such as Patchstack offer virtual patches that can serve as a temporary shield by blocking malicious requests before they reach the vulnerable plugin. – Prioritize systems: Identify and prioritize systems that process particularly sensitive data or are highly critical to business operations.
Long-term strategies: - Continuous vulnerability monitoring: Establish processes for continuously monitoring the software components in use; the plugin inventory should be regularly synchronized with databases such as WPScan or Patchstack. – Vendor Risk Management: Review the security practices of third-party vendors and plugin developers before deploying their software in your organization.
Relevance for Germany, Austria, and Switzerland: What EU Companies Need to Know Now
For companies in the DACH region, a potential security incident gives rise to additional obligations: If a breach affects the personal data of EU citizens, Article 33 of the GDPR applies—requiring notification to the competent data protection authority within 72 hours. Organizations that fall under the NIS 2 Directive or are classified as KRITIS operators should also check whether internal reporting and documentation obligations are triggered. The BSI generally recommends continuously inventorying exposed web applications and their third-party components and immediately implementing compensatory measures if patches are missing.
How LocateRisk Helps Secure WordPress Installations
Incidents such as the vulnerability CVE-2026-49109 show that the greatest risk often stems from forgotten or undocumented systems. LocateRisk automatically maps a company’s entire external attack surface and makes even such shadow IT visible—including WordPress installations on forgotten subdomains, projects no longer actively maintained, or uncataloged cloud assets. A proactive approach supports in Vendor Risk Management, to assess dependencies on third-party software. By continuously monitoring from the outside, the platform helps identify vulnerable WordPress installations and other exposed technologies early on and reduce the risk of exploitation.
The solution is Made in Germany and is operated in German data centers, which helps companies meet their GDPR requirements. Instead of relying on manual inventory lists, IT managers receive a dynamic and constantly updated overview of all externally accessible assets, enabling them to respond more quickly and effectively to critical vulnerabilities.
Sources and further information
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Frequently asked questions
According to Patchstack’s analysis, all versions of the plugin „Integration for Salesforce and Contact Form 7, WPForms, Elementor, Formidable, Ninja Forms“ up to and including version 1.4.3 related to the vulnerability CVE-2026-49109 affected. We strongly recommend that you check which version you are using.
An official patch from the developer, crm-perks, is available in version 1.4.4 (released in 2025). The recommended immediate action is to update to version 1.4.4 or higher. If an update is not possible immediately, the plugin should be deactivated.
According to Patchstack, there were no reports of actual attacks exploiting the CVE-2026-49109 vulnerability at the time of publication. However, since the vulnerability can be exploited remotely without authentication, immediate action is required: The update to version 1.4.4 or higher should be installed immediately.
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