What is CVE-2021-37534?

CVE-2021-37534 is a medium-severity vulnerability in Misp, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2021-07-26.

How severe is CVE-2021-37534?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Misp

CVE-2021-37534

app/View/GalaxyClusters/add.ctp in MISP 2.4.146 allows Stored XSS when forking a galaxy cluster.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2021-07-26 · last modified 2026-06-22.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.005 (41.1th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 41st percentile — 41.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Misp — versions 2.4.146
Misp-Project Misp — versions 2.4.146

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

github.com/MISP/MISP/commit/78edbbca64a1edc4390560cc106d0d418064355d (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2021-37534?: CVE-2021-37534 is a medium-severity vulnerability in Misp, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2021-07-26.
How severe is CVE-2021-37534?: Medium severity. CVSS v3 base score is 5.4 out of 10.