CVE-2021-40511
High
Published: 21 June 2022
Published
21 June 2022
Modified
21 November 2024
KEV Added
—
Patch
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CVSS Score v3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS Score
0.0047
65.0th percentile
Risk Priority
15
60% EPSS · 20% KEV · 20% CVSS
Summary
CVE-2021-40511 is a high-severity XML Entity Expansion (CWE-776) vulnerability in Obdasystems Mastro. Its CVSS base score is 7.5 (High).
Operationally, ranked in the top 35.0% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2021-27687
Vulnerability details
OBDA systems’ Mastro 1.0 is vulnerable to XML Entity Expansion (aka “billion laughs”) attack allowing denial of service.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
obdasystems
mastro
1.0
Mitigating Controls
No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.