What is CVE-2020-29594?

CVE-2020-29594 is a critical-severity vulnerability in Rocket.chat. CVSS score: 9.8/10. Published 2020-12-30.

How severe is CVE-2020-29594?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Rocket.chat

CVE-2020-29594

Rocket.Chat before 0.74.4, 1.x before 1.3.4, 2.x before 2.4.13, 3.x before 3.7.3, 3.8.x before 3.8.3, and 3.9.x before 3.9.1 mishandles SAML login.

Published 2020-12-30 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.016 (75.4th percentile), scored 2026-10-03.

Low probability of exploitation in the next 30 days, but still tracked. 75th percentile — 75.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.016 · newest: 0.016 · change: +0.000

Affected products

Rocket.chat

References

github.com/RocketChat/Rocket.Chat/releases/tag/3.9.1 (Third Party Advisory)
github.com/RocketChat/Rocket.Chat/compare/3.8.2...3.8.3 (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2020-29594?: CVE-2020-29594 is a critical-severity vulnerability in Rocket.chat. CVSS score: 9.8/10. Published 2020-12-30.
How severe is CVE-2020-29594?: Critical severity. CVSS v3 base score is 9.8 out of 10.