Reflected XSS Vulnerability in QcalAgent
Priority LOW 28CWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-79.
Summary
A cross-site scripting (XSS) vulnerability has been reported to affect QNAP device running QcalAgent. If exploited, this vulnerability allows remote attackers to inject malicious code. We have already fixed this vulnerability in the following versions of QcalAgent: QcalAgent 1.1.7 and later
Why it matters now
EPSS 0.0072 54th percentileScored 2026-11-07
Fix Fixed QcalAgent (QNAP Systems Inc.): 1.1.7
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
Remediation
- Fix · CNA QcalAgent (QNAP Systems Inc.) Fixed in 1.1.7
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Release ·
QNAP Systems QcalAgent 1.1.7
2 records Highest priority Priority LOW 2 LOW
Other records, highest priority first
- TI-2021-16250 Open Redirect Vulnerability in QcalAgentPriority LOW 28
Timeline
- 2026-10-02 Threatist record created from CVE-2021-38677
- 2026-10-03 Alias added: GHSA-63xm-g7fg-g945
References
More QNAP Qcalagent vulnerabilities
- TI-2023-21890 OS command injection in QNAP QcalAgent CVSS 3.1HIGH 8.8
- TI-2021-16250 Open Redirect Vulnerability in QcalAgent CVSS 3.1MEDIUM 6.1
Sources
- CVE-2021-38677 · CVE Program
- CVE-2021-38677 · NVD
- FIRST EPSS
- GHSA-63xm-g7fg-g945 · GitHub Advisory Database · CC BY 4.0
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