CVE-2025-30768: jAlbum Bridge Stored XSS Vulnerability

CVE-2025-30768 Overview

CVE-2025-30768 is a stored Cross-Site Scripting (XSS) vulnerability in the mlaza jAlbum Bridge (jalbum-bridge) WordPress plugin. The flaw stems from improper neutralization of user-supplied input during web page generation, classified as [CWE-79]. All versions of jAlbum Bridge up to and including 2.0.18 are affected. An authenticated attacker with low privileges can inject malicious script payloads that persist in the application and execute in the browsers of users who view the affected pages.

Critical Impact
Successful exploitation allows attackers to execute arbitrary JavaScript in victim browsers, potentially hijacking sessions, redirecting users to attacker-controlled sites, or performing actions on behalf of authenticated administrators.

Affected Products

mlaza jAlbum Bridge WordPress plugin (jalbum-bridge) versions up to and including 2.0.18
WordPress installations with the jAlbum Bridge plugin active
Sites where low-privileged users can submit content processed by the plugin

Discovery Timeline

2025-03-27 - CVE-2025-30768 published to the National Vulnerability Database
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-30768

Vulnerability Analysis

The vulnerability is a stored XSS flaw in the jAlbum Bridge plugin for WordPress. Stored XSS occurs when an application accepts input from a user, saves it in persistent storage, and later renders it in HTML output without proper escaping or sanitization. Because the payload is stored server-side, every user who loads the affected page executes the injected script within their browser session.

Exploitation requires an authenticated user with low privileges and some user interaction from the victim to trigger the payload. The attack can cross security boundaries, allowing script executing in one context to impact another. Confidentiality, integrity, and availability of user data are all at partial risk.

Root Cause

The root cause is missing or insufficient output encoding when the plugin renders user-controlled data into HTML pages. The plugin fails to apply WordPress escaping functions such as esc_html(), esc_attr(), or wp_kses() to values before echoing them into the DOM. Without contextual output encoding, HTML metacharacters supplied by an attacker are interpreted as markup rather than literal text.

Attack Vector

The attack vector is network-based and requires low-privileged authentication to the WordPress instance. An attacker submits a crafted payload containing HTML or JavaScript through a plugin input field that is stored by the application. When an administrator or other user loads the page containing the stored payload, the browser executes the injected script under the origin of the vulnerable site. This can lead to session token theft, forced administrative actions via CSRF-style requests, or redirection to malicious sites.

No verified public exploit code is available. See the Patchstack XSS Vulnerability Report for the technical advisory.

Detection Methods for CVE-2025-30768

Indicators of Compromise

Unexpected <script> tags, javascript: URIs, or HTML event handlers stored in WordPress database tables associated with jAlbum Bridge
Outbound HTTP requests from administrator browsers to unknown external hosts after visiting plugin-managed pages
New or modified WordPress administrator accounts, plugins, or scheduled tasks following visits to plugin pages
Anomalous session activity or authentication events from administrator accounts

Detection Strategies

Review the WordPress wp_posts, wp_postmeta, and plugin-specific tables for HTML tags or JavaScript in fields expected to contain plain text
Deploy web application firewall (WAF) rules that identify XSS payload patterns targeting the jalbum-bridge plugin endpoints
Enable Content Security Policy (CSP) reporting to capture inline script violations on plugin-rendered pages
Correlate administrator page views with subsequent unusual account or configuration changes

Monitoring Recommendations

Log and alert on POST requests to jAlbum Bridge plugin endpoints from low-privileged accounts
Monitor WordPress audit logs for changes to plugin configuration, user roles, and content submissions
Alert on browser CSP violation reports originating from pages rendered by the plugin
Track outbound network connections from administrator workstations following WordPress administration sessions

How to Mitigate CVE-2025-30768

Immediate Actions Required

Identify all WordPress installations running jAlbum Bridge version 2.0.18 or earlier
Deactivate the jAlbum Bridge plugin on affected sites until a patched version is available
Audit stored content in plugin-managed database tables for injected script payloads and remove any found
Rotate WordPress administrator credentials and invalidate active sessions if compromise is suspected

Patch Information

At the time of the NVD entry, the advisory indicates the vulnerability affects jAlbum Bridge up to and including version 2.0.18. Consult the Patchstack XSS Vulnerability Report and the plugin vendor for the current fixed release. Upgrade to the latest available version once released by the maintainer.

Workarounds

Deactivate and remove the jAlbum Bridge plugin until a patched version is confirmed available
Restrict plugin-related capabilities so that only trusted, high-privileged accounts can submit content processed by the plugin
Deploy a WAF with rules that block common XSS payload patterns targeting WordPress plugin endpoints
Implement a strict Content Security Policy that disallows inline scripts and untrusted script sources on the WordPress site

bash

# Configuration example: deactivate the vulnerable plugin via WP-CLI
wp plugin deactivate jalbum-bridge
wp plugin status jalbum-bridge