What is CVE-2021-31780?

CVE-2021-31780 is a high-severity vulnerability in Misp, classified under Improper Removal of Sensitive Information Before Storage or Transfer. CVSS score: 7.5/10. Published 2021-04-23.

How severe is CVE-2021-31780?

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

Vulnerability in Misp

CVE-2021-31780

In app/Model/MispObject.php in MISP 2.4.141, an incorrect sharing group association could lead to information disclosure on an event edit. When an object has a sharing group associated with an event edit, the sharing group object is ignored and instead the passed local ID is reused.

Published 2021-04-23 · last modified 2026-06-22.

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:H/I:N/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

Misp — versions 2.4.141
Misp-Project Misp — versions 2.4.141

Weakness classification (CWE)

CWE-212 — Improper Removal of Sensitive Information Before Storage or Transfer

References

github.com/MISP/MISP/commit/a0f08501d2850025892e703f40fb1570c7995478 (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2021-31780?: CVE-2021-31780 is a high-severity vulnerability in Misp, classified under Improper Removal of Sensitive Information Before Storage or Transfer. CVSS score: 7.5/10. Published 2021-04-23.
How severe is CVE-2021-31780?: High severity. CVSS v3 base score is 7.5 out of 10.