Critical · published October 9, 2025
🚨 A crafty README.md file can give attackers the keys to your digital castle! This is like a restaurant that allows anyone to slip a secret ingredient into the menu — a single change could affect every dish served. In this case, a malicious user can inject arbitrary JavaScript into Logseq's marketplace, compromising your data just like that sneaky ingredient spoiling your meal. An attacker could exploit this vulnerability to execute arbitrary code in the context of your Logseq application, potentially accessing sensitive data, taking control of your account, or spreading malware. If exploited, it could lead to catastrophic consequences for your digital environment, making this a critical threat that should not be overlooked!
This is like a restaurant that allows anyone to slip a secret ingredient into the menu — a single change could affect every dish served. In this case, a malicious user can inject arbitrary JavaScript into Logseq's marketplace, compromising your data just like that sneaky ingredient spoiling your meal. This XSS vulnerability in Logseq v0.10.9 allows attackers to execute malicious JavaScript by injecting it through a crafted README.md file in the /app/marketplace.html component, thus bypassing security measures and affecting users directly.
An attacker could exploit this vulnerability to execute arbitrary code in the context of your Logseq application, potentially accessing sensitive data, taking control of your account, or spreading malware. If exploited, it could lead to catastrophic consequences for your digital environment, making this a critical threat that should not be overlooked! Immediately upgrade Logseq to version 0.10.10 or later to patch this vulnerability. Additionally, audit any README.md files for untrusted content and educate users about the risks of executing scripts from unverified sources. Regularly review your applications for vulnerabilities to prevent future exploits. You've got this! Stay vigilant and follow these steps to secure your application. 🛡️