CVE-2021-34823

The ON24 ScreenShare (aka DesktopScreenShare.app) plugin before 2.0 for macOS allows remote file access via its built-in HTTP server

published August 13, 2021

CVSS
โ€”
EPSS
2%
Percentile
80.4
In the wild
Unconfirmed
What it is

๐Ÿšจ Remote file access is just a crafty request away! The ON24 ScreenShare plugin for macOS before version 2.0 has a sneaky HTTP server that lets unauthenticated users pull files straight from the logged-in user's machine. ๐Ÿ”ฅ Think of it like a restaurant where an unfriendly diner can just walk into the kitchen and grab any recipe off the shelf without anyone checking their credentials โ€” a recipe for disaster! An attacker could easily snatch sensitive files and configuration data from your macOS device, potentially leading to data leaks or further exploitation. If the attacker uploads malicious files, it could lead to even more chaos on your system!

Put simply

Think of it like a restaurant where an unfriendly diner can just walk into the kitchen and grab any recipe off the shelf without anyone checking their credentials โ€” a recipe for disaster! The ON24 ScreenShare plugin has an XXE vulnerability that permits unauthorized remote users to access local files via its built-in HTTP server, enabling them to download and upload files to and from your machine.

What to do

An attacker could easily snatch sensitive files and configuration data from your macOS device, potentially leading to data leaks or further exploitation. If the attacker uploads malicious files, it could lead to even more chaos on your system! Update the ON24 ScreenShare plugin to version 2.0 or later immediately to close this hole. Additionally, review your macOS security settings and ensure no unnecessary services are running that could expose sensitive data. ๐Ÿ›ก๏ธ You've got this! Stay vigilant and secure your macOS environment with these updates! ๐Ÿ’ชโœจ

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.01979 ยท 80.4th percentile
Published
2021-08-13T16:48Z
EPSS history
Timeline
  • 13 AUG 16:48Z
    The ON24 ScreenShare (aka DesktopScreenShare.app) plugin before 2.0 for macOS allows remote file access via its built-in HTTP server
    cvelistv5