CVE-2025-0878: Akinsoft LimonDesk XSS Vulnerability

CVE-2025-0878 Overview

CVE-2025-0878 is a Cross-Site Scripting (XSS) vulnerability affecting Akinsoft LimonDesk, a help desk and ticketing platform. The flaw results from improper neutralization of user-supplied input during web page generation, categorized under [CWE-79]. Authenticated attackers with high privileges can inject malicious scripts that execute in the browsers of other users interacting with the affected pages. The issue affects LimonDesk versions from s1.02.14 before v1.02.17. The vulnerability was disclosed through the Turkish National Cyber Incident Response Center (USOM) under advisory TR-25-0206.

Critical Impact

Authenticated attackers can inject client-side scripts that execute in victim browsers, enabling session hijacking, credential theft, and unauthorized actions within the LimonDesk application.

Affected Products

• Akinsoft LimonDesk s1.02.14
• Akinsoft LimonDesk versions prior to v1.02.17
• Deployments exposing the LimonDesk web interface to network-accessible authenticated users

Discovery Timeline

• 2025-09-03 - CVE-2025-0878 published to NVD
• 2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-0878

Vulnerability Analysis

The vulnerability stems from LimonDesk failing to sanitize or encode user-controlled input before rendering it in HTML responses. When an authenticated attacker submits crafted payloads containing HTML or JavaScript, the application stores or reflects the input without applying context-appropriate output encoding. Victims viewing the affected page execute the injected script within the trust context of the LimonDesk origin.

The attack requires network access to the application and valid high-privilege credentials. Successful exploitation impacts confidentiality, integrity, and availability of user session data. Because LimonDesk is a ticketing system, injected scripts can propagate through common workflows such as ticket viewing, comment threads, or administrative dashboards.

Root Cause

The root cause is missing input neutralization during web page generation, as classified under [CWE-79]. LimonDesk does not perform sufficient HTML entity encoding on fields rendered back to end users. The application trusts input from privileged users without applying a strict content sanitization layer, allowing script tags and event handlers to survive into the rendered DOM.

Attack Vector

An attacker with elevated LimonDesk privileges submits a payload containing HTML or JavaScript into a vulnerable input field. The payload is stored or reflected by the server and delivered in HTTP responses to other users. When a victim loads the affected page, the browser executes the attacker-controlled script. See the USOM Security Notification TR-25-0206 for additional technical context.

No public proof-of-concept exploit is available at the time of publication.

Detection Methods for CVE-2025-0878

Indicators of Compromise

• LimonDesk records containing <script>, javascript:, or common event-handler attributes such as onerror= and onload= in text fields.
• Outbound HTTP requests from user browsers to unknown domains immediately after loading LimonDesk pages.
• Unexpected session token transmissions or authentication anomalies from accounts that recently viewed tickets or dashboards.

Detection Strategies

• Review web server access logs for POST requests to LimonDesk endpoints containing HTML tags or URL-encoded script payloads.
• Deploy a Content Security Policy (CSP) in report-only mode to surface script-source violations that indicate injected content.
• Perform database queries against LimonDesk storage tables for fields containing script-related markup.

Monitoring Recommendations

• Monitor authenticated LimonDesk sessions for anomalous DOM mutations using browser telemetry or endpoint agents.
• Alert on privileged account activity that includes bulk edits to ticket content or template fields.
• Correlate LimonDesk web traffic with outbound network flows to identify data exfiltration attempts following XSS execution.

How to Mitigate CVE-2025-0878

Immediate Actions Required

• Upgrade Akinsoft LimonDesk to version v1.02.17 or later, which contains the vendor fix.
• Audit privileged LimonDesk accounts and rotate credentials for administrators who may have been targeted.
• Inspect existing ticket, comment, and template records for stored HTML or JavaScript payloads and remove them.

Patch Information

Akinsoft addressed the vulnerability in LimonDesk v1.02.17. Organizations running versions from s1.02.14 up to but not including v1.02.17 must apply the vendor update. Refer to the Siber Güvenlik Notification TR-25-0206 for vendor-coordinated advisory details.

Workarounds

• Restrict access to the LimonDesk administrative interface to trusted network segments using firewall rules or VPN gating.
• Enforce a strict Content Security Policy that blocks inline scripts and restricts script sources to trusted origins.
• Reduce the number of accounts assigned high-privilege roles until the patched version is deployed.

# Example restrictive Content Security Policy header for reverse proxy
add_header Content-Security-Policy "default-src 'self'; script-src 'self'; object-src 'none'; base-uri 'self'; frame-ancestors 'none';" always;