What is CVE-2021-30185?

CVE-2021-30185 is a high-severity vulnerability in Cern Indico. CVSS score: 7.5/10. Published 2021-04-07.

How severe is CVE-2021-30185?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Cern Indico

CVE-2021-30185

CERN Indico before 2.3.4 can use an attacker-supplied Host header in a password reset link.

Published 2021-04-07 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.010 (62.8th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 63rd percentile — 62.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

Cern Indico

References

www.shorebreaksecurity.com/blog/ (Third Party Advisory)
github.com/indico/indico/releases/tag/v2.3.4 (Third Party Advisory, Release Notes)

Frequently asked questions

What is CVE-2021-30185?: CVE-2021-30185 is a high-severity vulnerability in Cern Indico. CVSS score: 7.5/10. Published 2021-04-07.
How severe is CVE-2021-30185?: High severity. CVSS v3 base score is 7.5 out of 10.