PT-2021-15254 · Rocket.Chat · Rocket.Chat

Igor Sak-Sakovskiy + 1 · Published 2021-03-26 · Updated 2021-03-30 · CVE-2021-22886

Positive Technologies (AI Summary)

CVSS v3.1

6.1

Medium

Base vector

AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Name of the Vulnerable Software and Affected Versions Rocket.Chat versions prior to 3.11 Rocket.Chat version 3.10.5 Rocket.Chat version 3.9.7 Rocket.Chat version 3.8.8

Description The issue allows a remote attacker to inject arbitrary JavaScript in a message using nested markdown tags, leading to persistent cross-site scripting (XSS). This flaw can result in arbitrary file read and remote code execution (RCE) on the Rocket.Chat desktop app.

Recommendations For Rocket.Chat version 3.8.8, update to a version later than 3.8.8 to resolve the issue. For Rocket.Chat version 3.9.7, update to a version later than 3.9.7 to resolve the issue. For Rocket.Chat version 3.10.5, update to a version later than 3.10.5 to resolve the issue. For Rocket.Chat versions prior to 3.11, update to version 3.11 or later to resolve the issue.

Fix

RCE

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2021-22886

Affected Products

Rocket.Chat

References · 6

• https://github.com/RocketChat/Rocket.Chat/pull/20430 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2021-22886 · Security Note
• https://osv.dev/vulnerability/CVE-2021-22886 · Vendor Advisory
• https://docs.rocket.chat/guides/security/security-updates · Vendor Advisory
• https://hackerone.com/reports/1014459 · Note
• https://t.me/cvenotify/12341 · Telegram Post