High · published December 9, 2025
⚠️ A sneaky flaw in Static Web Server (SWS) lets attackers potentially access sensitive files outside the web root! 📂🔍 Picture a restaurant where patrons can order any dish, but the kitchen never checks if it’s on the menu — that’s how symlinks can escape the intended boundaries and reach sensitive files! If a malicious actor gets access to the SWS root directory, they could create malicious symlinks that point to sensitive files elsewhere on the server — think unauthorized access to user data or critical configuration files. While it's not currently exploited, the risk is real, and it can lead to data leaks or information exposure.
Picture a restaurant where patrons can order any dish, but the kitchen never checks if it’s on the menu — that’s how symlinks can escape the intended boundaries and reach sensitive files! Versions 2.40.0 and below of SWS fail to prevent symlinks from traversing outside the web root directory, allowing attackers who gain access to potentially exploit this to view restricted files by manipulating URLs or directory listings.
If a malicious actor gets access to the SWS root directory, they could create malicious symlinks that point to sensitive files elsewhere on the server — think unauthorized access to user data or critical configuration files. While it's not currently exploited, the risk is real, and it can lead to data leaks or information exposure. Upgrade your Static Web Server to version 2.40.1 to close this loophole immediately. Additionally, review your current directory permissions and server configurations to ensure enhanced security. Regular audits are also a good practice to prevent any unintended access. You've got this! Stay vigilant, follow these steps, and you'll keep your server safe and sound! 🛡️😊
| Product | Versions | Fixed in |
|---|---|---|
| static-web-server/static_web_server | ≤ 2.40.0 | — |