What is CVE-2020-24656?

CVE-2020-24656 is a medium-severity vulnerability in Maltego, classified under Improper Restriction of XML External Entity Reference (XXE). CVSS score: 6.5/10. Published 2020-08-26.

How severe is CVE-2020-24656?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Is CVE-2020-24656 known to be exploited?

5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XXE in Maltego

CVE-2020-24656

Maltego before 4.2.12 allows XXE attacks.

Vulnerability class: XXE (XML External Entity)

Published 2020-08-26 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.037 (89.5th percentile), scored 2026-10-04.

Low probability of exploitation in the next 30 days, but still tracked. 90th percentile — 89.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.037 · newest: 0.037 · change: 0.000

Affected products

Maltego

Weakness classification (CWE)

CWE-611 — Improper Restriction of XML External Entity Reference (XXE)

Public proof-of-concept exploits

References

www.maltego.com/changelog/ (Release Notes, Vendor Advisory)
www.hackersforchange.com/post/maltego-cve-2020-24656-analysis (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2020-24656?: CVE-2020-24656 is a medium-severity vulnerability in Maltego, classified under Improper Restriction of XML External Entity Reference (XXE). CVSS score: 6.5/10. Published 2020-08-26.
How severe is CVE-2020-24656?: Medium severity. CVSS v3 base score is 6.5 out of 10.
Is CVE-2020-24656 known to be exploited?: 5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.