Arch Linux Security Advisory ASA-202109-1 ========================================= Severity: High Date : 2021-09-14 CVE-ID : CVE-2021-39175 Package : hedgedoc Type : cross-site scripting Remote : Yes Link : https://security.archlinux.org/AVG-2331 Summary ======= The package hedgedoc before version 1.9.0-1 is vulnerable to cross-site scripting. Resolution ========== Upgrade to 1.9.0-1. # pacman -Syu "hedgedoc>=1.9.0-1" The problem has been fixed upstream in version 1.9.0. Workaround ========== None. Description =========== In HedgeDoc versions prior to 1.9.0, an unauthenticated attacker can inject arbitrary JavaScript into the speaker-notes of the slide-mode feature by embedding an iframe hosting the malicious code into the slides or by embedding the HedgeDoc instance into another page. Impact ====== An unauthenticated remote attacker could execute arbitrary JavaScript code in the slide mode of HedgeDoc. References ========== https://github.com/hedgedoc/hedgedoc/security/advisories/GHSA-j748-779h-9697 https://github.com/hedgedoc/hedgedoc/pull/1369 https://github.com/hedgedoc/hedgedoc/pull/1375 https://github.com/hedgedoc/hedgedoc/pull/1513 https://security.archlinux.org/CVE-2021-39175