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Vulnerability record · CVE-2021-40219 · published 11 April 2022

CVE-2021-40219: Bolt cms code injection vulnerability

Bolt · Bolt Cms

Bolt CMS <= 4.2 is vulnerable to Remote Code Execution. Unsafe theme rendering allows an authenticated attacker to edit theme to inject server-side template injection that leads to remote code execution.

8.8 CVSS 3.1 High EPSS 3.4% · top 11.5% CWE-94 · Code injection
8.8CVSS 3.1 base score, v2 6.5
3.4%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References, 4 tagged exploit
9 Jul 2026Last modified by NVD

Description

Bolt CMS <= 4.2 is vulnerable to Remote Code Execution. Unsafe theme rendering allows an authenticated attacker to edit theme to inject server-side template injection that leads to remote code execution.

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://github.com/bolt/core Third Party Advisory
https://github.com/bolt/core/blob/3b21a73ebf519b76756d3ad2841312d10ef11461/src/Controller/Frontend/TemplateController.ph ExploitThird Party Advisory
https://github.com/iiSiLvEr/CVEs/tree/main/CVE-2021-40219 ExploitThird Party Advisory
https://github.com/bolt/core Third Party Advisory
https://github.com/bolt/core/blob/3b21a73ebf519b76756d3ad2841312d10ef11461/src/Controller/Frontend/TemplateController.ph ExploitThird Party Advisory
https://github.com/iiSiLvEr/CVEs/tree/main/CVE-2021-40219 ExploitThird Party Advisory

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Related vulnerabilities

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

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Source: NIST National Vulnerability Database (record CVE-2021-40219), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.