CVE-2025-23894 Overview
CVE-2025-23894 is a reflected Cross-Site Scripting (XSS) vulnerability [CWE-79] in the WP Flickr Press WordPress plugin developed by tatsuya. The flaw affects all versions of the plugin up to and including 2.6.4. Attackers can inject malicious scripts that execute in a victim's browser when the victim clicks a crafted link. Successful exploitation requires user interaction but no authentication, and the attack crosses the security scope boundary to impact other components.
Critical Impact
Attackers can execute arbitrary JavaScript in the context of a victim's session, enabling session theft, credential harvesting, and unauthorized actions on behalf of authenticated WordPress users including administrators.
Affected Products
- WP Flickr Press plugin for WordPress
- All versions from initial release through 2.6.4
- WordPress sites with the vulnerable plugin installed and active
Discovery Timeline
- 2025-01-23 - CVE CVE-2025-23894 published to NVD
- 2026-04-23 - Last updated in NVD database
Technical Details for CVE-2025-23894
Vulnerability Analysis
The vulnerability stems from improper neutralization of user-supplied input during web page generation. The WP Flickr Press plugin reflects request parameters back into rendered HTML without applying adequate output encoding or input sanitization. An attacker constructs a URL containing malicious JavaScript payloads in vulnerable parameters. When a victim visits the crafted URL, the server returns a page that includes the attacker's script, which then executes in the victim's browser within the origin of the WordPress site.
Because the issue affects a changed security scope, the impact extends beyond the vulnerable component to other parts of the application context. This amplifies the potential consequences of a successful attack against authenticated WordPress users.
Root Cause
The root cause is missing or insufficient output escaping when rendering user-controlled input into HTML responses. The plugin fails to apply WordPress sanitization helpers such as esc_html(), esc_attr(), or wp_kses() to data echoed back to the response, allowing HTML and JavaScript syntax to be interpreted by the browser.
Attack Vector
The attack is network-based and requires no privileges. Exploitation requires victim interaction such as clicking a crafted link delivered through phishing emails, malicious advertisements, instant messages, or attacker-controlled web pages. Once the link is opened, the injected script runs with the privileges of the victim's WordPress session. If the victim is an administrator, the attacker can perform privileged actions including plugin installation, user account manipulation, and content modification.
Technical details are documented in the Patchstack Vulnerability Report.
Detection Methods for CVE-2025-23894
Indicators of Compromise
- Web server access logs containing requests to WP Flickr Press endpoints with URL parameters containing <script>, javascript:, onerror=, or onload= patterns
- URL-encoded payloads such as %3Cscript%3E or %3Cimg in query strings targeting plugin parameters
- Unexpected outbound requests from administrator browsers to attacker-controlled domains shortly after clicking external links
- New or modified WordPress administrator accounts created without authorized change records
Detection Strategies
- Inspect HTTP request and response pairs for reflected user input that includes HTML or script syntax in plugin-handled parameters
- Deploy a Web Application Firewall (WAF) with rulesets that flag common XSS payload signatures against WordPress endpoints
- Correlate suspicious URL parameter content with referer headers originating from external phishing infrastructure
- Monitor browser-side Content Security Policy (CSP) violation reports for blocked inline script execution attempts
Monitoring Recommendations
- Enable WordPress audit logging to capture administrative actions performed shortly after suspicious link visits
- Centralize web server, WAF, and WordPress logs into a SIEM for correlation across user sessions and source IPs
- Track installed plugin versions across WordPress estates and alert when vulnerable WP Flickr Press builds are present
- Review referer and user-agent telemetry for administrator sessions to identify abnormal navigation patterns
How to Mitigate CVE-2025-23894
Immediate Actions Required
- Identify all WordPress installations running WP Flickr Press version 2.6.4 or earlier
- Deactivate the plugin until a patched release is installed if the plugin is not business-critical
- Apply WAF rules to block known XSS payload patterns targeting plugin parameters
- Force re-authentication for administrator accounts and rotate session cookies on affected sites
Patch Information
At the time of NVD publication, the advisory indicates the vulnerability affects WP Flickr Press through version 2.6.4 with no fixed version listed. Administrators should consult the Patchstack Vulnerability Report and the WordPress plugin repository for updated release information and install the latest available version once published.
Workarounds
- Disable or uninstall the WP Flickr Press plugin until a patched version is available
- Deploy a Content Security Policy (CSP) restricting inline scripts and limiting trusted script sources
- Configure a WAF such as ModSecurity with the OWASP Core Rule Set to filter reflected XSS payloads
- Train administrators and content editors to avoid clicking unsolicited links to their own WordPress sites
# Example WordPress WP-CLI commands to inventory and deactivate the vulnerable plugin
wp plugin list --name=wp-flickr-press --fields=name,status,version
wp plugin deactivate wp-flickr-press
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
