CVE-2025-10637 is a vulnerability identified in the Social Feed Gallery plugin for WordPress, developed by quadlayers, affecting all versions up to and including 4.9.2. The root cause is a missing authorization check (CWE-862), which means the plugin fails to verify whether a user is authorized to perform certain actions related to accessing Instagram profile and media data connected to the WordPress site. This flaw allows unauthenticated attackers to exfiltrate sensitive Instagram data that the site owner has linked, without needing any credentials or user interaction. The vulnerability is classified as an information exposure issue, impacting confidentiality but not integrity or availability. The CVSS 3.1 base score is 5.3, with vector AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N, indicating network exploitable, low attack complexity, no privileges or user interaction required, and limited confidentiality impact. No public exploits are known at this time, but the vulnerability could be leveraged to harvest Instagram content, potentially violating user privacy and leading to reputational damage for affected organizations. The plugin is widely used for embedding social media feeds, making this a relevant threat for WordPress sites that integrate Instagram content. The lack of a patch at the time of disclosure necessitates interim mitigations to prevent unauthorized data access.

For European organizations, the primary impact is the unauthorized disclosure of Instagram profile and media data linked to their WordPress sites. This can lead to privacy violations, especially if the exposed data includes sensitive or proprietary content. Organizations relying on social media feeds for marketing or customer engagement may suffer reputational harm if attackers exploit this vulnerability to scrape or misuse Instagram data. Although the vulnerability does not affect system integrity or availability, the confidentiality breach could contravene GDPR regulations, resulting in legal and financial penalties. The ease of exploitation—requiring no authentication or user interaction—raises the risk of automated mass data harvesting. This threat is particularly relevant for companies in sectors like retail, media, and hospitality that actively use Instagram feeds on their websites to engage European customers. The exposure could also facilitate further social engineering or phishing attacks by providing attackers with detailed social media content.

Immediate mitigation should focus on restricting access to the Social Feed Gallery plugin endpoints that expose Instagram data. Organizations can implement web application firewall (WAF) rules to block unauthenticated requests targeting the plugin’s API or feed URLs. Until an official patch is released, administrators should consider disabling the plugin or removing Instagram feed integrations if feasible. Applying custom authorization logic via WordPress hooks or filters to enforce user authentication before serving Instagram data can reduce exposure. Monitoring web server logs for unusual access patterns to plugin resources can help detect exploitation attempts. Organizations should subscribe to quadlayers and WordPress security advisories to promptly apply patches once available. Additionally, conducting regular audits of third-party plugins and minimizing the number of plugins with external data integrations reduces the attack surface. Educating site administrators about the risks of outdated plugins and enforcing strict update policies is also critical.