CVE-2025-0877 Overview
CVE-2025-0877 is a Cross-Site Scripting (XSS) vulnerability affecting AtaksAPP Reservation Management System versions prior to 4.2.3. The issue stems from improper neutralization of user-supplied input during web page generation, classified under [CWE-79]. An authenticated attacker with high privileges can inject arbitrary script content that executes in the context of other users' browsers. The flaw was reported through Turkey's National Cyber Incident Response Center (USOM) under advisory TR-25-0059.
Critical Impact
An authenticated attacker can inject malicious JavaScript into the Reservation Management System, enabling session hijacking, credential theft, or unauthorized actions performed in the victim's browser context.
Affected Products
- AtaksAPP Reservation Management System versions before 4.2.3
Discovery Timeline
- 2025-03-06 - CVE-2025-0877 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-0877
Vulnerability Analysis
The vulnerability resides in the Reservation Management System's handling of user-supplied input rendered into web pages. The application fails to properly sanitize or encode input before reflecting it in HTML responses. This allows an attacker to inject script payloads that the browser executes as legitimate page content. Exploitation requires authenticated access with high privileges, which limits the pool of potential attackers to internal users or accounts already compromised through other means.
The attack traverses the network without user interaction, and successful exploitation impacts confidentiality, integrity, and availability at a limited scope. According to EPSS data, the vulnerability has a low probability of exploitation, with a score of 0.296% as of September 2026.
Root Cause
The root cause is missing or insufficient output encoding when reflecting user-controlled input into HTML contexts within the Reservation Management System. The application processes input without applying context-aware escaping for HTML, JavaScript, or attribute contexts. This design flaw maps to CWE-79, Improper Neutralization of Input During Web Page Generation.
Attack Vector
An authenticated attacker with high-privilege access submits input containing script content through an affected reservation management interface. When the application renders this input in a web page viewed by another user, the browser interprets the injected content as executable script. The attacker can then exfiltrate session tokens, perform unauthorized actions on behalf of the victim, or manipulate displayed content. No verified public proof-of-concept code is available. See the USOM Notification TR-25-0059 for the original advisory.
Detection Methods for CVE-2025-0877
Indicators of Compromise
- Unexpected <script> tags, event handlers (onerror, onload), or JavaScript URI schemes stored in reservation-related database fields.
- Web server logs showing HTTP requests containing encoded payloads such as %3Cscript%3E or javascript: directed at Reservation Management System endpoints.
- Anomalous outbound requests from authenticated user sessions to unfamiliar domains, indicating potential session token exfiltration.
Detection Strategies
- Deploy web application firewall (WAF) rules that inspect POST and GET parameters for XSS signatures targeting the Reservation Management System.
- Perform authenticated dynamic application security testing (DAST) scans against /reservation endpoints to identify reflected or stored injection points.
- Review application audit logs for high-privilege user submissions containing HTML or JavaScript metacharacters.
Monitoring Recommendations
- Alert on Content Security Policy (CSP) violation reports originating from the reservation application.
- Monitor privileged account activity for atypical form submissions or bulk record modifications.
- Track browser-side JavaScript errors and network requests correlated with reservation page loads.
How to Mitigate CVE-2025-0877
Immediate Actions Required
- Upgrade AtaksAPP Reservation Management System to version 4.2.3 or later, which contains the vendor fix.
- Audit all high-privilege accounts and rotate credentials for any accounts suspected of compromise.
- Review stored reservation records for previously injected payloads and sanitize affected entries.
Patch Information
The vendor has released version 4.2.3 of the Reservation Management System, which addresses the input neutralization flaw. Refer to the Siber Güvenlik Notification TR-25-0059 for vendor advisory details and upgrade guidance.
Workarounds
- Restrict high-privilege account access to trusted administrators and enforce multi-factor authentication.
- Deploy a Content Security Policy (CSP) header that disallows inline scripts and restricts script sources to trusted origins.
- Place the application behind a WAF configured with XSS protection rulesets until the patch is applied.
# Example Content Security Policy header to reduce XSS impact
Content-Security-Policy: default-src 'self'; script-src 'self'; object-src 'none'; base-uri 'self'; frame-ancestors 'none'
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
