What is CVE-2021-40510?

CVE-2021-40510 is a high-severity vulnerability in Obdasystems Mastro, classified under Improper Restriction of XML External Entity Reference (XXE). CVSS score: 7.5/10. Published 2022-06-21.

How severe is CVE-2021-40510?

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

XXE in Obdasystems Mastro

CVE-2021-40510

XML eXternal Entity (XXE) in OBDA systems’ Mastro 1.0 allows remote attackers to read system files via custom DTDs.

Vulnerability class: XXE (XML External Entity)

Published 2022-06-21 · 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:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.013 (70.0th percentile), scored 2026-10-04.

Low probability of exploitation in the next 30 days, but still tracked. 70th percentile — 70.0% 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

Obdasystems Mastro — versions 1.0

Weakness classification (CWE)

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

References

www.obdasystems.com/mastro (Product, Vendor Advisory)
www.cyberiskvision.com/advisory/ (Third Party Advisory)

Frequently asked questions

What is CVE-2021-40510?: CVE-2021-40510 is a high-severity vulnerability in Obdasystems Mastro, classified under Improper Restriction of XML External Entity Reference (XXE). CVSS score: 7.5/10. Published 2022-06-21.
How severe is CVE-2021-40510?: High severity. CVSS v3 base score is 7.5 out of 10.