How severe is CVE-2021-24579?

CVE-2021-24579 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-24579 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 8% (94th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-24579?

CVE-2021-24579 affects Bold-themes Bold Page Builder. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-24579?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-24579 published?

CVE-2021-24579 was published on 2021-08-30 and last updated on 2026-06-17.

CVE-2021-24579

CVE-2021-24579 is a high-severity vulnerability in Bold-themes Bold Page Builder with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-502.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 6.5
EPSS exploit prediction: 8% (94th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-502
Affected product: Bold-themes Bold Page Builder
Published: 2021-08-30
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2021-24579?: 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.
How severe is CVE-2021-24579?: CVE-2021-24579 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-24579 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 8% (94th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-24579?: CVE-2021-24579 affects Bold-themes Bold Page Builder. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-24579?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-24579 published?: CVE-2021-24579 was published on 2021-08-30 and last updated on 2026-06-17.

References

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

Affected products (1)

cpe:2.3:a:bold-themes:bold_page_builder:*:*:*:*:*:wordpress:*:*

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