OBDA systems’ Mastro 1.0 is vulnerable to XML Entity Expansion (aka “billion laughs”) attack allowing denial of service.
Priority LOW 35CWE-776Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
OBDA systems’ Mastro 1.0 is vulnerable to XML Entity Expansion (aka “billion laughs”) attack allowing denial of service.
Why it matters now
EPSS 0.00943 61st percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:obdasystems:mastro:1.0:*:*:*:*:*:*:* | 1.0 | Vulnerable | Obdasystems |
- cpe:2.3:a:obdasystems:mastro:1.0:*:*:*:*:*:*:* Versions 1.0 Vulnerable ·Obdasystems
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-40511
- 2026-10-03 Alias added: GHSA-cv78-jp3v-7557
References
More Obdasystems Mastro vulnerabilities
- TI-2021-17555 XML eXternal Entity (XXE) in OBDA systems’ Mastro 1.0 allows remote attackers to read system files via custom DTDs. CVSS 3.1HIGH 7.5
Sources
- CVE-2021-40511 · CVE Program
- CVE-2021-40511 · NVD
- FIRST EPSS
- GHSA-cv78-jp3v-7557 · GitHub Advisory Database · CC BY 4.0
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