CVE-2026-85305 in SEOPress Plugin
Summary
by MITRE • 09/03/2026
Server-Side Request Forgery (SSRF) vulnerability in SEOPress allows Server Side Request Forgery.
This issue affects SEOPress: from n/a through 10.1.
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Analysis
by VulDB Data Team • 09/03/2026
The identified security flaw represents a critical server-side request forgery vulnerability within the SEOPress plugin, affecting versions ranging from its initial release up to version 10.1. Server-Side Request Forgery is a class of vulnerabilities where an attacker tricks the server into making requests to internal or external resources that would otherwise be inaccessible. In this specific context, the flaw likely stems from insufficient validation and sanitization of user-supplied input used in HTTP requests initiated by the application itself. When SEOPress processes data provided by users without properly verifying the destination URL's legitimacy or origin, it creates a pathway for malicious actors to manipulate these server-side actions. This type of vulnerability is particularly dangerous because the requests originate from the trusted backend infrastructure, allowing them to bypass firewalls and access control mechanisms that typically protect internal network segments.
From a technical perspective, this flaw aligns with Common Weakness Enumeration identifier CWE-918, which describes Server-Side Request Forgery (SSRF). The core issue lies in the application's failure to enforce strict allowlists for outbound connections or its reliance on naive parsing of URL inputs. Attackers can exploit this by crafting specific HTTP requests that direct the server to fetch content from localhost interfaces, internal metadata services such as those found in cloud environments like AWS EC2 instance metadata service (IMDS), or other private network resources. By leveraging these forged requests, an attacker may be able to enumerate internal network topology, access sensitive configuration files stored on local servers, or interact with administrative APIs that are not exposed to the public internet. The vulnerability is exacerbated by the fact that SEOPress operates as a WordPress plugin, often running with elevated privileges within the CMS environment, thereby increasing the potential blast radius of any successful exploitation attempt.
The operational impact of this SSRF vulnerability extends beyond simple data leakage. If an attacker successfully exploits this flaw to access internal services, they may retrieve sensitive information such as database credentials, API keys, or session tokens stored in local configuration files. In cloud-hosted environments, accessing the instance metadata service can lead to the compromise of temporary security credentials associated with the server's identity, potentially granting full control over other resources within that cloud account. Furthermore, this vulnerability facilitates further attacks by allowing attackers to perform port scanning against internal hosts or conduct denial-of-service attacks against critical infrastructure components from a trusted source IP address. This makes detection significantly more difficult for network monitoring tools, as the traffic appears legitimate and originates from an authorized application server.
In terms of threat modeling, this vulnerability maps directly to MITRE ATT&CK technique T1598, specifically Steganography or SSRF via cloud infrastructure metadata services if exploited in a cloud context, or generally under Reconnaissance techniques like Internal Network Discovery (T1046). The attacker uses the compromised server as a pivot point to gather intelligence about the internal network structure. This capability is often a precursor to more severe compromises, such as lateral movement within the network or privilege escalation through interaction with vulnerable internal services.
To mitigate this risk, immediate action is required for all installations of SEOPress prior to version 10.2. Administrators should update the plugin to the latest patched version where input validation and URL filtering mechanisms have been strengthened. In cases where an upgrade is not immediately feasible, network-level mitigations can be employed. Implementing strict egress firewall rules that restrict outbound connections from the web server to only necessary external domains can significantly reduce the attack surface. Additionally, configuring application firewalls or WAFs to detect and block requests containing patterns indicative of SSRF attempts, such as private IP addresses in URL parameters, provides an additional layer of defense. It is also advisable to disable unnecessary HTTP functionality within PHP if not required by the plugin's core features, thereby reducing the potential vectors for exploitation. Regular security audits and penetration testing focused on outbound request validation are recommended to ensure that similar vulnerabilities do not exist elsewhere in the application stack.