XSS in Rocket.chat

CVE-2020-8291

A link preview rendering issue in Rocket.Chat versions before 3.9 could lead to potential XSS attacks.

Vulnerability class: XSS (Cross-Site Scripting)

Published · last modified .

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.

EPSS exploit prediction

EPSS: 0.006 (48.1th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 48th percentile — 48.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2020-8291: held from 0.006 to 0.006.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

  • Rocket.chat
  • Rocket.chat Server — versions Fixed versions: 3.10, 3.9.4, 3.8.5

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2020-8291?
CVE-2020-8291 is a medium-severity vulnerability in Rocket.chat, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-10-18.
How severe is CVE-2020-8291?
Medium severity. CVSS v3 base score is 6.1 out of 10.