CVE-2025-63822: SirenGPS Auth Bypass Vulnerability

CVE-2025-63822 Overview

CVE-2025-63822 affects the SirenGPS Android application version 2.19.44. The vulnerability is an Insecure Direct Object Reference (IDOR) flaw in the mobile application's API. An authenticated attacker can manipulate user identifier parameters in API requests to bypass authorization controls. This grants unauthorized READ and WRITE access to other users' personal information. The application's backend fails to validate whether the requesting user is authorized to access or modify the target user's data.

Critical Impact
Any authenticated user can read and modify arbitrary users' personal information by tampering with user identifier parameters sent to the API.

Affected Products

SirenGPS Android Application version 2.19.44
Distributed via Google Play (com.sirengps.mobile)
The associated backend API endpoints that consume user identifier parameters

Discovery Timeline

2026-08-05 - CVE-2025-63822 published to the National Vulnerability Database (NVD)
2026-08-05 - Last updated in NVD database

Technical Details for CVE-2025-63822

Vulnerability Analysis

The vulnerability is a Broken Access Control weakness, specifically an Insecure Direct Object Reference. The SirenGPS mobile API accepts user identifier parameters supplied by the client and returns or updates records tied to that identifier. The server-side logic authenticates the session but never confirms that the authenticated principal owns the requested resource.

Because the authorization check is missing, the identifier acts as the sole reference to the target object. An attacker who intercepts a legitimate request can substitute a different user identifier and receive that user's data. The same substitution works for write operations, permitting unauthorized modification of another account's personal information.

The flaw impacts confidentiality and integrity of stored user data. Personal information handled by an emergency and location-sharing application is sensitive, and unauthorized write access could allow an attacker to alter emergency contacts or profile details tied to another user.

Root Cause

The root cause is missing server-side authorization enforcement on API endpoints that accept a user identifier as a parameter. The backend trusts the client-supplied identifier without cross-checking it against the authenticated session context.

Attack Vector

An attacker must first authenticate to the SirenGPS service with a valid account. Using an intercepting proxy such as Burp Suite or mitmproxy, the attacker captures outbound API requests. The attacker then modifies the user identifier field in the request body or query string to reference a victim account. The server processes the request and returns or updates the victim's records. Refer to the GitHub Security Advisory for the reporter's technical description.

Detection Methods for CVE-2025-63822

Indicators of Compromise

API request logs showing a single authenticated session accessing multiple distinct user identifier values within a short window
Server-side audit records where the authenticated user identifier does not match the target user identifier in the request payload
Unexpected profile or personal-information write operations originating from accounts that do not own the modified record

Detection Strategies

Instrument the backend API to log both the session-derived user identifier and the request-parameter user identifier, then alert on mismatches
Baseline normal per-user access patterns and flag sessions that enumerate sequential or high-cardinality user identifiers
Correlate mobile client telemetry with server audit logs to identify request tampering originating from proxied traffic

Monitoring Recommendations

Forward API gateway and application logs to a centralized analytics platform for retention and query
Build dashboards that surface high-volume access to distinct user records from a single authenticated principal
Alert on write operations targeting personal information fields when the actor and target identifiers differ

How to Mitigate CVE-2025-63822

Immediate Actions Required

Inventory devices running com.sirengps.mobile and identify the installed version
Restrict or suspend use of SirenGPS 2.19.44 for handling sensitive personal data until a fixed version is confirmed
Rotate credentials for accounts that may have been exposed through the vulnerable endpoints
Monitor the Google Play listing for an updated release

Patch Information

No vendor patch is referenced in the enriched CVE data at the time of publication. Users should track the GitHub Security Advisory and the vendor's Google Play listing for a fixed release beyond version 2.19.44.

Workarounds

Avoid storing sensitive personal information in SirenGPS accounts until a patched version is released
On the server side, enforce authorization by comparing the session-bound user identifier to any identifier supplied in request parameters before returning or writing data
Reject API requests where the request-parameter user identifier does not match the authenticated principal, unless an explicit administrative scope is present

bash

# Example server-side authorization check (pseudocode)
if request.user_id != session.authenticated_user_id:
    if not session.has_scope("admin"):
        return 403