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Vulnerability record · CVE-2021-24579 · published 30 August 2021

CVE-2021-24579: Bold-themes bold page builder deserialization of untrusted data vulnerability

Bold Themes · Bold Page Builder

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.

8.8 CVSS 3.1 High EPSS 8.2% · top 5.3% CWE-502 · Deserialization of untrusted data
8.8CVSS 3.1 base score, v2 6.5
8.2%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References, 2 tagged exploit
17 Jun 2026Last modified by NVD

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.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://wpscan.com/vulnerability/08edce3f-2746-4886-8439-76e44ec76fa8 ExploitThird Party Advisory
https://wpscan.com/vulnerability/08edce3f-2746-4886-8439-76e44ec76fa8 ExploitThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

8.8CVE-2024-50417Bold-themes bold page builder missing authorization vulnerabilityMissing Authorization vulnerability in boldthemes Bold Page Builder bold-page-builder allows Exploiting Incorrectly Configured Access Control Securit…EPSS 1.9%7.5CVE-2019-15821Bold-themes bold page builder vulnerabilityThe bold-page-builder plugin before 2.3.2 for WordPress has no protection against modifying settings and importing data.EPSS 11%5.4CVE-2024-53801Bold-themes bold page builder cross-site scripting vulnerabilityImproper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in boldthemes Bold Page Builder bold-page-builder …EPSS 0.40%5.4CVE-2024-47298Bold-themes bold page builder cross-site scripting vulnerabilityImproper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in boldthemes Bold Page Builder bold-page-builder …EPSS 0.33%5.4CVE-2024-47391Bold-themes bold page builder cross-site scripting vulnerabilityImproper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in boldthemes Bold Page Builder bold-page-builder …EPSS 0.31%5.4CVE-2024-7100Bold-themes bold page builder cross-site scripting vulnerabilityThe Bold Page Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's bt_bb_button shortcode in all versions up to…EPSS 0.44%5.4CVE-2024-2734Bold-themes bold page builder cross-site scripting vulnerabilityThe Bold Page Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's AI features all versions up to, and includin…EPSS 0.52%5.4CVE-2024-2735Bold-themes bold page builder cross-site scripting vulnerabilityThe Bold Page Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'Price List' element in all versions up to, and inclu…EPSS 0.52%

Source: NIST National Vulnerability Database (record CVE-2021-24579), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.