Calibre-Web Has a Stored Cross-Site Scripting (XSS) Vulnerability via the 'username' Field During User Creation
A Stored Cross-Site Scripting (XSS) vulnerability in Calibre-Web v0.6.25 allows attackers to inject malicious JavaScript into the 'username' field during user creation. The payload is stored unsanitized and later executed when the /ajax/listusers endpoint is accessed.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Python (PyPI) | calibreweb | <= 0.6.25 | no fix |
References
- CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:P- Weakness (CWE)
CWE-79- Platform
- Python (PyPI)
- Package
calibreweb- Disclosed
- 02.12.2025
- Updated
- 11.10.2026 13:18
Sources and licenses
OSV / GitHub Advisory Database - PYSEC-2026-1234 - PyPA Advisory Database; CC BY 4.0
OSV / GitHub Advisory Database - GHSA-pc5g-j9j7-p4q3 - CC BY 4.0
Vulnerability history: calibreweb
All published vulnerabilities of this package (Python (PyPI)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 18
- First → latest
- 01.2022 12.2025
- Without a fix
- 4
- Exploited in attacks
- 0
Severity breakdown
- Critical 4
- High 4
- Medium 9
- Low 1
Disclosures per year
- 2022: 9
- 2023: 2
- 2024: 4
- 2025: 3
- 2026: 0
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Calibre-Web Has a Stored Cross-Site Scripting (XSS) Vulnerability via the 'username' Field During User Creation this entry
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