CVE-2025-3687
📋 TL;DR
This CVE describes a Cross-Site Request Forgery (CSRF) vulnerability in the Sticky Notes Handler component of misstt123 oasys 1.0. Attackers can trick authenticated users into performing unintended actions by crafting malicious requests. Users of oasys 1.0 with the Sticky Notes feature enabled are affected.
💻 Affected Systems
- misstt123 oasys
📦 What is this software?
Oasys by Misstt123
⚠️ Risk & Real-World Impact
Worst Case
An attacker could perform unauthorized actions on behalf of authenticated users, potentially modifying or deleting sticky notes, or exploiting other authenticated functionality if the CSRF protection is insufficient.
Likely Case
Attackers trick users into performing unintended actions within their sticky notes, such as creating, editing, or deleting notes without their consent.
If Mitigated
With proper CSRF tokens and same-origin policies, the vulnerability would be prevented, and no unauthorized actions could be performed.
🎯 Exploit Status
The exploit has been publicly disclosed and requires the victim to be authenticated. CSRF attacks are typically low complexity.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://github.com/misstt123/oasys/issues/11
Restart Required: No
Instructions:
Monitor the GitHub repository for updates. Since it's a rolling release, check for the latest version and update accordingly. No specific patch version is available.
🔧 Temporary Workarounds
Implement CSRF Tokens
allAdd CSRF tokens to all state-changing requests in the Sticky Notes Handler.
Use SameSite Cookies
allSet the SameSite attribute on session cookies to 'Strict' or 'Lax' to mitigate CSRF.
Set-Cookie: session=value; SameSite=Strict; Secure; HttpOnly
🧯 If You Can't Patch
- Disable the Sticky Notes Handler component if not required.
- Implement network-level controls such as WAF rules to block CSRF attempts.
🔍 How to Verify
Check if Vulnerable:
Review the Sticky Notes Handler code for missing CSRF protection. Test by attempting to submit a form without a CSRF token.Check Version:
Check the application version via the interface or configuration files, as it's a rolling release.Verify Fix Applied:
Verify that all state-changing requests in the Sticky Notes Handler include and validate CSRF tokens.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to sticky notes endpoints without referrer headers or CSRF tokens.
Network Indicators:
- Requests to sticky notes endpoints from unexpected origins or without CSRF tokens.
SIEM Query:
source="web_logs" AND (uri_path="/sticky_notes" OR uri_path LIKE "%/sticky_notes/%") AND http_method="POST" AND (referrer IS NULL OR referrer NOT LIKE "%yourdomain%")