Bolt CMS <= 4.2 is vulnerable to Remote Code Execution.
Priority MEDIUM 44CWE-94Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-94.
Summary
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.
Why it matters now
EPSS 0.03428 89th percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
| — | bolt/core (Packagist) | up to 4.2 | — | No fix listed | GHSA-gprh-7767-cw39 |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
- bolt/core (Packagist) Vendor— Affected up to 4.2 Fixed in — No fix listed GHSA-gprh-7767-cw39
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-40219
- 2026-10-03 Alias added: GHSA-gprh-7767-cw39
References
More Bolt Cms vulnerabilities
- TI-2022-16851 Bolt CMS contains a vulnerability in version 5.1.12 and below that allows an… CVSS 3.1HIGH 8.8
- TI-2018-14123 Bolt CMS <3.6.2 allows XSS via text input click preview button as demonstrated by the… CVSS 3.0MEDIUM 6.1
Sources
- CVE-2021-40219 · CVE Program
- CVE-2021-40219 · NVD
- FIRST EPSS
- GHSA-gprh-7767-cw39 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences