CVE-2025-54786: SuiteCRM Auth Bypass Vulnerability

CVE-2025-54786 Overview

CVE-2025-54786 is a broken authentication vulnerability in SuiteCRM, an open-source enterprise Customer Relationship Management (CRM) application maintained by SalesAgility. The flaw resides in the legacy iCal service and affects SuiteCRM versions 7.14.6 and 8.8.0. An unauthenticated remote attacker can view any user's meeting (calendar event) data by supplying a target username. Related functionality also enables user enumeration against the application. The issue is categorized under CWE-200: Exposure of Sensitive Information to an Unauthorized Actor. SalesAgility resolved the issue in SuiteCRM 7.14.7 and 8.8.1.

Critical Impact
Unauthenticated attackers can retrieve any user's calendar/meeting data over the network and enumerate valid usernames, exposing organizational intelligence useful for targeted phishing and reconnaissance.

Affected Products

SuiteCRM 7.14.6
SuiteCRM 8.8.0
Deployments exposing the legacy iCal endpoint to untrusted networks

Discovery Timeline

2025-08-07 - CVE-2025-54786 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-54786

Vulnerability Analysis

The vulnerability exists in the legacy iCal service shipped with SuiteCRM. The service exposes calendar data through a URL-based interface intended for iCal client subscription. In the affected releases, this endpoint does not enforce authentication before returning meeting data associated with a supplied username. An attacker reaching the endpoint over HTTP or HTTPS can request any user's calendar and receive event details in response.

Exposed meeting data typically includes subjects, descriptions, attendees, times, and locations. That information can reveal internal projects, customer engagements, executive schedules, and organizational structure. Related endpoint behavior differentiates between valid and invalid usernames, enabling account enumeration that supports credential-stuffing and phishing campaigns.

Root Cause

The root cause is missing authentication and authorization checks on the legacy iCal handler. The component was designed to serve calendar feeds using URL parameters as the sole selector, without validating an authenticated session or a per-user secret token. Access control was effectively delegated to knowledge of the username, which is not a secret.

Attack Vector

Exploitation requires network access to the SuiteCRM web interface and knowledge or guessing of a target username. No user interaction, privileges, or client-side execution are required. Attackers issue HTTP GET requests to the legacy iCal endpoint with the target username as a parameter and parse the returned iCalendar payload. Refer to the GitHub Security Advisory GHSA-rf2v-4mv3-qcgm for authoritative technical detail.

Detection Methods for CVE-2025-54786

Indicators of Compromise

Anonymous HTTP requests to legacy iCal routes returning text/calendar content or BEGIN:VCALENDAR payloads.
High volumes of requests iterating through candidate usernames from a single source address.
Access log entries showing unauthenticated GET requests to iCal endpoints outside of normal business hours or from non-corporate IP ranges.

Detection Strategies

Review web server and reverse proxy logs for requests to the legacy iCal endpoint that do not carry an authenticated session cookie.
Alert on repeated 200 OK responses to iCal requests correlated with sequential or dictionary-style username parameters.
Correlate application logs with authentication logs to identify calendar access that has no matching login event.

Monitoring Recommendations

Ingest SuiteCRM access logs into a centralized log analytics or SIEM platform and build detections for anonymous calendar endpoint hits.
Track outbound data volumes from the CRM host to detect bulk enumeration of meeting content.
Monitor for scanning behavior against known SuiteCRM URL patterns following the publication of CVE-2025-54786.

How to Mitigate CVE-2025-54786

Immediate Actions Required

Upgrade SuiteCRM 7.14.6 to 7.14.7 or later, and SuiteCRM 8.8.0 to 8.8.1 or later.
Restrict access to the SuiteCRM web interface from untrusted networks using a reverse proxy, WAF, or network ACLs while patching is scheduled.
Audit web access logs for prior unauthenticated iCal requests and identify whose calendar data may have been exposed.

Patch Information

SalesAgility fixed the broken authentication in SuiteCRM 7.14.7 and 8.8.1. Administrators should follow the upgrade procedure documented in the SuiteCRM 8.8 Release Notes and the fix details published in the GitHub Security Advisory GHSA-rf2v-4mv3-qcgm.

Workarounds

Block the legacy iCal route at the web server or WAF layer until the upgrade is applied.
Require authentication in front of the CRM using an authenticating reverse proxy or VPN for administrative networks.
Rotate any usernames or aliases that follow predictable patterns to reduce enumeration success, recognizing this is a temporary control.

bash

# Example nginx snippet to block the legacy iCal endpoint until patched
location ~* /ical(server)?\.php$ {
    return 403;
}