CVE-2025-54783: SuiteCRM Reflected XSS Vulnerability

CVE-2025-54783 Overview

CVE-2025-54783 is a Reflected Cross-Site Scripting (XSS) vulnerability affecting SuiteCRM, an open-source enterprise Customer Relationship Management (CRM) platform maintained by SalesAgility. Versions 7.14.6 and below process the HTTP Referer header without sufficient sanitization. An attacker can append malicious JavaScript to an arbitrary domain in the Referer header, and the server-side filter blocks the domain but permits the trailing script content to execute in the victim's browser. The issue is tracked under CWE-79 and is fixed in SuiteCRM 7.14.7.

Critical Impact
Successful exploitation executes attacker-controlled JavaScript in an authenticated user's browser session, enabling session data theft, CRM record manipulation, and phishing pivots.

Affected Products

SuiteCRM versions 7.14.6 and earlier in the 7.14.x branch
SalesAgility SuiteCRM open-source distributions
Self-hosted SuiteCRM deployments exposed to untrusted network traffic

Discovery Timeline

2025-08-07 - CVE-2025-54783 published to the National Vulnerability Database
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-54783

Vulnerability Analysis

The vulnerability is a Reflected Cross-Site Scripting flaw triggered through the HTTP Referer request header. SuiteCRM reflects the header value into server-generated responses used for redirect and navigation logic. Its sanitization routine attempts to strip disallowed domains from the Referer value but does not remove the JavaScript payload appended after the domain string.

Because the filter operates on the domain component rather than the full string, attacker-controlled JavaScript beyond the domain survives sanitization and is emitted into the HTML response. When a browser renders the response, the injected script executes in the SuiteCRM origin, inheriting the victim's session cookies and CRM permissions.

The attack requires user interaction, typically clicking a crafted link that sets the Referer header before landing on a vulnerable SuiteCRM endpoint.

Root Cause

The root cause is incomplete input validation on the Referer header. The server enforces a domain allowlist without HTML-encoding or fully stripping trailing content, violating the CWE-79 principle of contextual output encoding. Trusting a client-controlled header for reflection compounds the flaw.

Attack Vector

Exploitation follows a standard reflected XSS chain:

The attacker crafts a URL or intermediary page that forces the victim's browser to send a manipulated Referer header containing attacker.tld followed by JavaScript.
The victim, authenticated to SuiteCRM, is directed to a vulnerable endpoint.
SuiteCRM reflects the crafted Referer value into the response after stripping only the domain segment.
The browser parses the response and executes the surviving JavaScript within the SuiteCRM origin.

The attacker gains access to session tokens, CSRF tokens, and any DOM data the authenticated user can view, including customer records and pipeline data. See the GitHub Security Advisory GHSA-vqrj-gp9m-8c6r for the vendor's technical write-up.

Detection Methods for CVE-2025-54783

Indicators of Compromise

HTTP requests to SuiteCRM endpoints where the Referer header contains <script>, javascript:, onerror=, or URL-encoded equivalents such as %3Cscript%3E.
Web server access logs showing anomalously long Referer values or values containing HTML tag characters.
Outbound browser requests from SuiteCRM sessions to unfamiliar domains shortly after users click external links.
Session tokens or CSRF tokens observed in third-party traffic captures.

Detection Strategies

Deploy a Web Application Firewall (WAF) rule that inspects the Referer header for HTML metacharacters and known XSS payload patterns.
Correlate authenticated SuiteCRM sessions with unexpected DOM-initiated network callouts using browser or endpoint telemetry.
Review SuiteCRM audit logs for record accesses or modifications that do not match legitimate user workflow patterns following suspicious navigation events.

Monitoring Recommendations

Enable verbose logging of HTTP request headers at the reverse proxy in front of SuiteCRM.
Alert on repeated 200 responses to SuiteCRM URLs with Referer header lengths exceeding a defined baseline.
Monitor Content Security Policy (CSP) violation reports for script-src breaches originating from SuiteCRM hosts.

How to Mitigate CVE-2025-54783

Immediate Actions Required

Upgrade all SuiteCRM instances to version 7.14.7 or later, which contains the vendor fix.
Inventory internet-exposed SuiteCRM deployments and prioritize public-facing hosts for patching first.
Force session invalidation for all active users after upgrading to limit reuse of any stolen tokens.
Notify CRM users to avoid clicking untrusted links that could send them to the SuiteCRM domain.

Patch Information

SalesAgility resolved CVE-2025-54783 in SuiteCRM 7.14.7. Refer to the SuiteCRM 7.14.7 Release Notes for the full changelog and upgrade instructions. Administrators should validate database and custom module compatibility in a staging environment before promoting the patched build to production.

Workarounds

Configure the upstream reverse proxy or WAF to strip or normalize the Referer header before it reaches SuiteCRM.
Enforce a strict Content Security Policy that disallows inline scripts and restricts script-src to trusted origins.
Restrict SuiteCRM access to VPN or SSO-gated networks to reduce exposure to untrusted referrers.

bash

# Example nginx snippet to sanitize the Referer header before proxying to SuiteCRM
location / {
    proxy_set_header Referer "";
    add_header Content-Security-Policy "default-src 'self'; script-src 'self'; object-src 'none'; base-uri 'self';";
    proxy_pass http://suitecrm_backend;
}