What is CVE-2020-11436?

CVE-2020-11436 is a critical-severity vulnerability in Librehealth Ehr, classified under Cross-site Scripting. CVSS score: 9.0/10. Published 2020-07-15.

How severe is CVE-2020-11436?

Critical severity. CVSS v3 base score is 9.0 out of 10.

XSS in Librehealth Ehr

CVE-2020-11436

LibreHealth EMR v2.0.0 is vulnerable to XSS that results in the ability to force arbitrary actions on behalf of other users including administrators.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2020-07-15 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.013 (70.4th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 70th percentile — 70.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · change: 0.000

Affected products

Librehealth Ehr — versions 2.0.0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

know.bishopfox.com/advisories (Third Party Advisory)
librehealth.io/ (Vendor Advisory)
labs.bishopfox.com/advisories/librehealth-version-2.0.0-0 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2020-11436?: CVE-2020-11436 is a critical-severity vulnerability in Librehealth Ehr, classified under Cross-site Scripting. CVSS score: 9.0/10. Published 2020-07-15.
How severe is CVE-2020-11436?: Critical severity. CVSS v3 base score is 9.0 out of 10.