CVE-2026-92381 Overview
CVE-2026-92381 is a cross-site scripting (XSS) vulnerability affecting PbootCMS versions up to and including 3.2.22. The flaw resides in the decode_string function of apps/admin/controller/content/ContentController.php within the Template Rendering component. An authenticated attacker can inject malicious script content through the Title argument, which is then rendered without proper sanitization. The vulnerability is classified under [CWE-79] and is exploitable remotely with low privileges and user interaction. Public exploit details have been disclosed, though no active exploitation has been confirmed.
Critical Impact
Attackers can inject arbitrary JavaScript into rendered content, enabling session hijacking, credential theft, or administrative action forgery against authenticated PbootCMS users.
Affected Products
- PbootCMS versions up to and including 3.2.22
- Component: Template Rendering (ContentController.php)
- Function: decode_string
Discovery Timeline
- 2026-09-16 - CVE-2026-92381 published to NVD
- 2026-09-16 - Last updated in NVD database
Technical Details for CVE-2026-92381
Vulnerability Analysis
The vulnerability exists in PbootCMS, a PHP-based content management system. The decode_string function within apps/admin/controller/content/ContentController.php processes the Title parameter without applying output encoding or input sanitization before rendering it in a template context.
When an authenticated user submits content with a crafted Title value, the decoded string is written to the rendered page. A browser processes the injected payload as executable script within the trust context of the PbootCMS administrative interface. The reported GitHub issue tracking the flaw was closed with the resolution status "completed," indicating vendor acknowledgment.
Root Cause
The root cause is missing output encoding during template rendering. The decode_string routine reverses an encoded representation of the title but does not apply HTML entity encoding on the resulting characters. Because the output flows into an HTML context, attacker-controlled <script> tags or event handler attributes execute in the victim's browser session.
Attack Vector
Exploitation requires the attacker to hold low-privileged authenticated access to the PbootCMS backend and requires a victim to view the affected content. The attacker submits a content entry with a malicious Title value containing JavaScript. When another user, such as an administrator, loads the rendered content, the payload executes in that user's browser. The scope of impact is limited to the client-side context, but stolen session tokens can be leveraged for further account takeover.
No verified exploit code is republished here. Public technical details are available through the referenced advisories.
Detection Methods for CVE-2026-92381
Indicators of Compromise
- Unexpected <script>, onerror, onload, or javascript: sequences stored in PbootCMS content titles.
- Outbound requests from administrator browsers to unfamiliar domains shortly after loading admin pages.
- New or unexpected administrator accounts created following content edits from low-privileged users.
Detection Strategies
- Review PbootCMS database rows in the content table for Title fields containing HTML tags or JavaScript keywords.
- Inspect web server access logs for POST requests to apps/admin/controller/content/ContentController.php that include suspicious title parameters.
- Correlate content submissions by low-privileged accounts with subsequent administrator session activity.
Monitoring Recommendations
- Enable and monitor Content Security Policy (CSP) violation reports on the PbootCMS admin interface.
- Log all content creation and modification events with the submitting user identity and payload metadata.
- Alert on repeated failed CSP directives originating from the administrative console.
How to Mitigate CVE-2026-92381
Immediate Actions Required
- Restrict access to the PbootCMS administrative interface to trusted networks using IP allowlisting or a VPN.
- Audit existing content records for injected script payloads in the Title field and remove or sanitize any malicious entries.
- Revoke and reissue session cookies for administrators who may have viewed attacker-controlled content.
Patch Information
No official vendor patch is referenced in the available advisory data. The tracking issue on the PbootCMS GitHub repository was marked "completed," and administrators should monitor the repository for a released fix. Additional details are available in the VulDB entry for CVE-2026-92381.
Workarounds
- Deploy a web application firewall (WAF) rule that inspects and blocks HTML tags in the Title parameter submitted to the admin controller.
- Enforce a strict Content Security Policy that disallows inline script execution on administrative pages.
- Limit backend account privileges so only vetted users can submit or modify content until a patched release is deployed.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
