High ยท published December 2, 2025
๐จ A sneaky Server-Side Template Injection (SSTI) vulnerability lurks in Grav, allowing even authenticated users with editor permissions to execute arbitrary commands! ๐ฅ Think of it like a restaurant where the chef is granted access to not just the kitchen but also the safe where all the secrets are stored. If the chef were to forget to check the ingredients properly, they could accidentally cook up a recipe that opens the vault! An attacker could exploit this vulnerability to unleash chaos on the server โ imagine altering files or even gaining unauthorized access to sensitive data. With the right commands, they could compromise the entire system, leading to a catastrophic loss of trust and integrity.
Think of it like a restaurant where the chef is granted access to not just the kitchen but also the safe where all the secrets are stored. If the chef were to forget to check the ingredients properly, they could accidentally cook up a recipe that opens the vault! This SSTI vulnerability arises from weak regex validation within Grav's cleanDangerousTwig method, allowing authenticated users to inject and execute arbitrary code on the server.
An attacker could exploit this vulnerability to unleash chaos on the server โ imagine altering files or even gaining unauthorized access to sensitive data. With the right commands, they could compromise the entire system, leading to a catastrophic loss of trust and integrity. Immediately update Grav to version 1.8.0-beta.27 to close this exploit. Additionally, review user permissions to minimize risks and enforce stricter regex validation to prevent similar vulnerabilities in the future. You've got this! With these steps, you'll be back to securing your server like the hero you are! ๐ก๏ธ
| Product | Versions | Fixed in |
|---|---|---|
| getgrav/grav | โฅ 1.7.48, < 1.8.0 | 1.8.0 |
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| getgrav/grav | all versions | โ |