CVE-2024-56036 Overview
CVE-2024-56036 is a reflected Cross-Site Scripting (XSS) vulnerability in the odPhotogallery WordPress plugin developed by Ondrej Donek. The flaw affects all versions up to and including 0.5.3 and stems from improper neutralization of user-supplied input during web page generation [CWE-79]. Attackers can craft a malicious URL that, when visited by an authenticated or unauthenticated victim, executes arbitrary JavaScript in the victim's browser session. The vulnerability is exploitable over the network without prior authentication but requires user interaction such as clicking a crafted link.
Critical Impact
Successful exploitation enables session hijacking, credential theft, and arbitrary actions in the context of the affected WordPress site visitor.
Affected Products
- Ondrej Donek odPhotogallery WordPress plugin (od-photogallery-plugin)
- All versions from initial release through 0.5.3
- WordPress sites with the plugin installed and active
Discovery Timeline
- 2025-01-02 - CVE-2024-56036 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2024-56036
Vulnerability Analysis
The odPhotogallery plugin fails to sanitize and encode user-controlled input before reflecting it into HTTP responses. This omission allows an attacker to inject arbitrary HTML and JavaScript through request parameters that the plugin echoes back into the rendered page. Because the script executes within the security context of the vulnerable site, attackers can steal authentication cookies, manipulate the Document Object Model (DOM), and perform actions on behalf of the victim. The scope change indicated by the vulnerability classification means injected content can affect resources beyond the vulnerable component itself.
Root Cause
The root cause is improper neutralization of input during web page generation, classified as [CWE-79]. The plugin accepts request parameters and includes them in HTML output without applying contextual output encoding or input validation. Standard WordPress sanitization helpers such as esc_html(), esc_attr(), and wp_kses() are not applied consistently to the affected sinks.
Attack Vector
Exploitation requires the attacker to deliver a crafted URL containing a malicious payload to a target user. When the user loads the URL on a site running a vulnerable instance of odPhotogallery, the server reflects the payload into the response and the browser executes the embedded script. No authentication is required on the attacker side, but user interaction is mandatory. Common delivery vectors include phishing emails, malicious advertisements, and links posted in forums or messaging platforms.
For reproduction details and proof-of-concept information, refer to the Patchstack Vulnerability Report.
Detection Methods for CVE-2024-56036
Indicators of Compromise
- Web server access logs containing requests to odPhotogallery plugin endpoints with parameters embedding <script>, javascript:, onerror=, or onload= substrings.
- Outbound requests from end-user browsers to attacker-controlled domains immediately following visits to plugin URLs.
- WordPress administrator sessions exhibiting unexpected cookie exfiltration or unauthorized configuration changes.
Detection Strategies
- Inspect HTTP query strings and POST bodies for HTML control characters such as <, >, and " directed at paths containing od-photogallery-plugin.
- Deploy Web Application Firewall (WAF) signatures targeting reflected XSS payload patterns and known XSS encoding techniques.
- Correlate referer headers and URL patterns across user agents to identify mass-distributed exploitation links.
Monitoring Recommendations
- Enable verbose logging on the WordPress reverse proxy or WAF to capture full request URIs for plugin endpoints.
- Monitor for anomalous Content Security Policy (CSP) violation reports referencing injected inline scripts.
- Alert on administrator account activity originating from unfamiliar IP addresses or user agents shortly after URL clicks.
How to Mitigate CVE-2024-56036
Immediate Actions Required
- Identify all WordPress installations with the od-photogallery-plugin and confirm installed versions.
- Deactivate and remove the plugin if a patched version is not yet available from the maintainer.
- Force a password reset and session invalidation for administrators who may have clicked suspicious links.
Patch Information
No fixed version has been published in the NVD record at the time of writing. Versions through 0.5.3 remain affected. Monitor the Patchstack Vulnerability Report and the official plugin repository for an updated release that applies output encoding to all reflected parameters.
Workarounds
- Restrict access to plugin endpoints via WAF rules that block requests containing HTML or script syntax in query parameters.
- Enforce a strict Content Security Policy that disallows inline scripts and limits script sources to trusted origins.
- Train administrators to avoid clicking unsolicited links pointing to the WordPress site and to use isolated browser profiles for site administration.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
