XSS in Rocket.chat
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.
Vulnerability class: XSS (Cross-Site Scripting)
EPSS: 0.017 (74.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
Affected products
- Rocket.chat — versions 3.11.0
- N/a Rocket.chat — versions Fixed in 3.11, 3.10.5, 3.9.7, 3.8.8
Weakness classification (CWE)
References
- support@hackerone.com (x_refsource_MISC, Vendor Advisory)
- support@hackerone.com (Third Party Advisory, x_refsource_MISC)
- support@hackerone.com (Patch, Third Party Advisory, x_refsource_MISC)
Frequently asked questions
- What is CVE-2021-22886?
- CVE-2021-22886 is a medium-severity vulnerability in Rocket.chat, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-03-26.
- How severe is CVE-2021-22886?
- Medium severity. CVSS v3 base score is 6.1 out of 10.