Vulnerability Database

309,364

Total vulnerabilities in the database

CVE-2021-22886

Rocket.Chat before 3.11, 3.10.5, 3.9.7, 3.8.8 is vulnerable to persistent cross-site scripting (XSS) using nested markdown tags allowing a remote attacker to inject arbitrary JavaScript in a message. This flaw leads to arbitrary file read and RCE on Rocket.Chat desktop app.

  • Published: Mar 26, 2021
  • Updated: Nov 16, 2025
  • CVE: CVE-2021-22886
  • Severity: Medium
  • Exploit:

CVSS v3:

  • Severity: Medium
  • Score: 6.1
  • AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS v2:

  • Severity: Low
  • Score: 4.3
  • AV:N/AC:M/Au:N/C:N/I:P/A:N

CWEs:

OWASP TOP 10:

Software From Fixed in
rocket.chat / rocket.chat 3.11.0-rc0 3.11.0-rc0.x
rocket.chat / rocket.chat 3.11.0-rc1 3.11.0-rc1.x
rocket.chat / rocket.chat 3.11.0-rc2 3.11.0-rc2.x
rocket.chat / rocket.chat 3.11.0-rc3 3.11.0-rc3.x
rocket.chat / rocket.chat 3.11.0-rc4 3.11.0-rc4.x
rocket.chat / rocket.chat 3.11.0-rc5 3.11.0-rc5.x
rocket.chat / rocket.chat 3.11.0-rc6 3.11.0-rc6.x
rocket.chat / rocket.chat 3.11.0-rc7 3.11.0-rc7.x
rocket.chat / rocket.chat 3.10.0 3.10.5
rocket.chat / rocket.chat 3.9.0 3.9.7
rocket.chat / rocket.chat - 3.8.8