CVE-2025-0546 Overview
CVE-2025-0546 affects Mevzuattr Software's MevzuatTR product in versions released before 12.02.2025. The vulnerability combines two weaknesses: improper neutralization of input during web page generation (Cross-Site Scripting, [CWE-79]) and improper restriction of rendered UI layers or frames. Attackers with high privileges can leverage these flaws to conduct phishing, iFrame overlay attacks, clickjacking, and forceful browsing against application users. The issue was published to the National Vulnerability Database on 2025-09-17.
Critical Impact
Authenticated attackers with high privileges can inject scripts and manipulate rendered UI frames in MevzuatTR to deceive users, hijack clicks, and access resources through forceful browsing.
Affected Products
- Mevzuattr Software MevzuatTR versions released before 12.02.2025
- Web-facing MevzuatTR deployments accessible over the network
- Instances where high-privilege accounts have not been rotated or restricted
Discovery Timeline
- 2025-09-17 - CVE-2025-0546 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-0546
Vulnerability Analysis
The vulnerability pairs a stored or reflected Cross-Site Scripting flaw with a missing frame-ancestors restriction. MevzuatTR does not neutralize user-controlled input rendered into web pages, allowing attackers to inject HTML or JavaScript that executes in a victim's browser session. The application also fails to restrict where its UI can be embedded, so third-party pages can render MevzuatTR content inside hidden or opaque frames. The combined weakness enables phishing overlays, clickjacking, and forceful browsing to unintended resources. Exploitation requires an account with high privileges, which limits the pool of attackers but raises the impact when insider access is abused.
Root Cause
The root cause is missing output encoding on data rendered into MevzuatTR web pages, combined with absent frame-protection controls such as X-Frame-Options or a Content Security Policy frame-ancestors directive. Together, these gaps let script content execute and let external sites embed the application UI.
Attack Vector
An authenticated high-privilege attacker submits crafted input that MevzuatTR later renders without sanitization, executing scripts in another user's session. In parallel, an attacker-controlled page loads MevzuatTR inside a transparent iframe and overlays deceptive elements to capture clicks or redirect actions. Forceful browsing rounds out the attack by requesting URLs that the application fails to protect at the UI layer. Technical details are referenced in the USOM Notification TR-25-0269 and Siber Güvenlik Notification TR-25-0269.
Detection Methods for CVE-2025-0546
Indicators of Compromise
- Unusual <script>, <iframe>, or event-handler payloads stored in MevzuatTR content fields or logged in HTTP request bodies
- HTTP responses from MevzuatTR lacking X-Frame-Options or Content-Security-Policy: frame-ancestors headers
- Referer headers pointing to unknown external domains that load MevzuatTR pages inside frames
- Access patterns from high-privilege accounts hitting endpoints outside their normal workflow
Detection Strategies
- Inspect application logs for administrative account activity that submits HTML or JavaScript into text or metadata fields.
- Correlate web server access logs to identify third-party origins embedding MevzuatTR content in frames.
- Run authenticated web application scans that flag reflected and stored XSS on MevzuatTR endpoints.
Monitoring Recommendations
- Monitor for anomalous privileged sessions that create or modify content shortly before user-reported UI issues.
- Alert on HTTP responses served by MevzuatTR that omit anti-framing headers.
- Track outbound clicks and referrals from users landing on MevzuatTR through unexpected parent frames.
How to Mitigate CVE-2025-0546
Immediate Actions Required
- Upgrade MevzuatTR to a release dated 12.02.2025 or later, as identified by the vendor.
- Review and rotate credentials for all high-privilege MevzuatTR accounts.
- Audit recent administrator activity for injected script content and remove any tainted records.
- Restrict administrative access to trusted networks and enforce multi-factor authentication.
Patch Information
Mevzuattr Software addressed the issue in MevzuatTR builds released on or after 12.02.2025. Refer to the USOM Notification TR-25-0269 and Siber Güvenlik Notification TR-25-0269 for vendor coordination details and update guidance.
Workarounds
- Deploy a reverse proxy or web application firewall rule to add X-Frame-Options: DENY and a strict Content-Security-Policy: frame-ancestors 'self' to MevzuatTR responses.
- Apply a WAF ruleset that blocks script tags and common XSS payloads in requests to MevzuatTR administrative endpoints.
- Enforce least privilege by removing unnecessary high-privilege roles until patching is complete.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
