CVE-2021-32744CWE-639

Unauthenticated attacker could gain access to currently open files

Critical · published July 21, 2021

CVSS v3.1
9.8
EPSS
1%
Percentile
64.1
In the wild
Unconfirmed
What it is

🚨 An unauthenticated guess could let attackers peek at live documents! If your Collabora Online version is earlier than 4.2.17-1 or 6.4.9-5, you might be giving a front-row seat to your files. 🔥 Imagine a busy restaurant where the waitstaff leaves the kitchen door wide open, allowing anyone to wander in and see what’s being cooked! In this case, guessing the file identifier is like knowing the exact table number to find out what everyone’s ordering without permission. An attacker could access confidential documents currently in use, potentially leading to data leaks or corporate espionage. This ability to snoop on real-time collaboration is absolutely devastating for privacy and security. Protecting your sensitive information becomes nearly impossible!

Put simply

Imagine a busy restaurant where the waitstaff leaves the kitchen door wide open, allowing anyone to wander in and see what’s being cooked! In this case, guessing the file identifier is like knowing the exact table number to find out what everyone’s ordering without permission. This vulnerability allows unauthenticated users to exploit predictable file identifiers to access files currently opened by other users in the Collabora Online editor, a classic case of an Insecure Direct Object Reference (IDOR).

What to do

An attacker could access confidential documents currently in use, potentially leading to data leaks or corporate espionage. This ability to snoop on real-time collaboration is absolutely devastating for privacy and security. Protecting your sensitive information becomes nearly impossible! Upgrade your Collabora Online application to at least version 4.2.17-1 or 6.4.9-5 to patch this critical vulnerability. Ensure any integrations with external file storage are also secured to prevent similar issues. Don't leave your sensitive info exposed! You've got this! Take these steps to secure your files and boost your security hero status! 🛡️

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.01053 · 64.1th percentile
Weakness
CWE-639 · Authorization Bypass Through User-Controlled Key
Published
2021-07-21T16:00Z
EPSS history
Timeline
  • 21 JUL 16:00Z
    Unauthenticated attacker could gain access to currently open files
    cvelistv5