XML external entity injection in Cybozu, Inc. Cybozu Remote Service
Priority LOW 31CWE-611Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-611 and the CVSS impact.
Summary
Cybozu Remote Service 3.1.8 to 3.1.9 allows a remote authenticated attacker to conduct XML External Entity (XXE) attacks and obtain the information stored in the product via unspecified vectors. This issue occurs only when using Mozilla Firefox.
Why it matters now
EPSS 0.01064 64th 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 |
|---|---|---|---|---|---|
| Cybozu, Inc. | Cybozu Remote Service | 3.1.8 to 3.1.9 | — | No fix listed | CNA |
- Cybozu Remote Service VendorCybozu, Inc. Affected 3.1.8 to 3.1.9 Fixed in — No fix listed CNA
CPE configurations NVD · 2
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:cybozu:remote_service_manager:3.1.8:*:*:*:*:*:*:* | 3.1.8 | Vulnerable | Cybozu, Inc. |
| cpe:2.3:a:cybozu:remote_service_manager:3.1.9:*:*:*:*:*:*:* | 3.1.9 | Vulnerable | Cybozu, Inc. |
- cpe:2.3:a:cybozu:remote_service_manager:3.1.8:*:*:*:*:*:*:* Versions 3.1.8 Vulnerable ·Cybozu, Inc.
- cpe:2.3:a:cybozu:remote_service_manager:3.1.9:*:*:*:*:*:*:* Versions 3.1.9 Vulnerable ·Cybozu, Inc.
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-20801
- 2026-10-03 Alias added: GHSA-33hf-cc48-qxc6
References
More Cybozu, Inc. Remote Service Manager vulnerabilities
- TI-2018-11568 Path traversal in Cybozu, Inc. Cybozu Remote Service CVSS 3.0HIGH 8.8
- TI-2018-11566 Unrestricted file upload in Cybozu, Inc. Cybozu Remote Service CVSS 3.0HIGH 8.8
- TI-2021-04020 Cross-site request forgery in Cybozu, Inc. Cybozu Remote Service CVSS 3.1HIGH 8.8
- TI-2018-11567 Path traversal in Cybozu, Inc. Cybozu Remote Service CVSS 3.0HIGH 8.1
- TI-2014-01551 Unspecified vulnerability in Cybozu Remote Service Manager through 2.3.0 and 3.x before… CVSS 2.0HIGH 7.8
- TI-2014-06051 Algorithmic complexity vulnerability in Cybozu Remote Service Manager through 2.3.0 and… CVSS 2.0HIGH 7.8
Sources
- CVE-2021-20801 · CVE Program
- CVE-2021-20801 · NVD
- FIRST EPSS
- GHSA-33hf-cc48-qxc6 · GitHub Advisory Database · CC BY 4.0
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