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CVE-2020-4040

CSRF issue on preview pages in Bolt CMS

8.6 HighPublic exploitFix available

Bolt CMS before version 3.7.1 lacked CSRF protection in the preview generating endpoint. Previews are intended to be generated by the admins, developers, chief-editors, and editors, who are authorized to create content in the application. But due to lack of proper CSRF protection, unauthorized users could generate a preview. This has been fixed in Bolt 3.7.1

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
None
Availability
None

Exploit likelihood

1.77%Down 3.6 points since Apr 14, 2021
90%50%10%1%

What each source reports

CVE List Score used 8.6

CSRF issue on preview pages in Bolt CMS

Bolt CMS before version 3.7.1 lacked CSRF protection in the preview generating endpoint. Previews are intended to be generated by the admins, developers, chief-editors, and editors, who are authorized to create content in the application. But due to lack of proper CSRF protection, unauthorized users could generate a preview. This has been fixed in Bolt 3.7.1

Record
CVE-2020-4040
CVSS 3.1
8.6 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
Weakness
CWE-352
Updated
2026-11-02
EUVDEUVD-2020-0450 8.6

Bolt CMS before version 3.7.1 lacked CSRF protection in the preview generating endpoint. Previews are intended to be generated by the admins, developers, chief-editors, and editors, who are authorized to create content in the application. But due to lack of proper CSRF protection, unauthorized users could generate a preview. This has been fixed in Bolt 3.7.1

Record
EUVD-2020-0450
CVSS 3.1
8.6 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
Updated
2026-11-03
GitHub AdvisoriesGHSA-2q66-6cc3-6xm8 8.6

CSRF issue on preview pages in Bolt CMS

Impact

Bolt CMS lacked CSRF protection in the preview generating endpoint. Previews are intended to be generated by the admins, developers, chief-editors, and editors, who are authorized to create content in the application. But due to lack of proper CSRF protection, unauthorized users could generate a preview.

Patches

This has been fixed in Bolt 3.7.1

References

Related issue: https://github.com/bolt/bolt/pull/7853

Record
GHSA-2q66-6cc3-6xm8
CVSS 3.1
8.6 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
Weakness
CWE-352
Updated
2026-11-02
NVD 8.6

Bolt CMS before version 3.7.1 lacked CSRF protection in the preview generating endpoint. Previews are intended to be generated by the admins, developers, chief-editors, and editors, who are authorized to create content in the application. But due to lack of proper CSRF protection, unauthorized users could generate a preview. This has been fixed in Bolt 3.7.1

Record
CVE-2020-4040
CVSS 3.1
8.6 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
CVSS 3.1
4.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
CVSS 2.0
4.3 MediumAV:N/AC:M/Au:N/C:N/I:P/A:N
Weakness
CWE-352
Updated
2026-11-02
OSVAZL-110318 4.3

CVE-2020-4040 affecting package bolt 0.9.8-1

Bolt CMS before version 3.7.1 lacked CSRF protection in the preview generating endpoint. Previews are intended to be generated by the admins, developers, chief-editors, and editors, who are authorized to create content in the application. But due to lack of proper CSRF protection, unauthorized users could generate a preview. This has been fixed in Bolt 3.7.1

Record
AZL-110318
CVSS 3.1
4.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Updated
2026-11-05
OSV 4.3

Bolt CMS before version 3.7.1 lacked CSRF protection in the preview generating endpoint. Previews are intended to be generated by the admins, developers, chief-editors, and editors, who are authorized to create content in the application. But due to lack of proper CSRF protection, unauthorized users could generate a preview. This has been fixed in Bolt 3.7.1

Record
CVE-2020-4040
CVSS 3.1
4.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Updated
2026-11-02
OSVGHSA-2q66-6cc3-6xm8 8.6

CSRF issue on preview pages in Bolt CMS

Impact

Bolt CMS lacked CSRF protection in the preview generating endpoint. Previews are intended to be generated by the admins, developers, chief-editors, and editors, who are authorized to create content in the application. But due to lack of proper CSRF protection, unauthorized users could generate a preview.

Patches

This has been fixed in Bolt 3.7.1

References

Related issue: https://github.com/bolt/bolt/pull/7853

Record
GHSA-2q66-6cc3-6xm8
CVSS 3.1
8.6 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
Weakness
CWE-352
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
bolt/bolt
Packagist
 before 3.7.1
3.7.1
bolt
Azure Linux:3
 through 0.9.8-1 None known
bolt/bolt
Packagist
 before 3.7.1, plus listed versions
3.5.7v0.8.4v0.8.5v0.9.10v0.9.5
Show 45 moreShow less
v1.0.0v1.0.5v1.1.2v1.1.4v1.2.1v1.3.0v1.4.0v1.4.3v1.5.1v1.5.6v1.6.0v1.6.2v1.6.3v1.6.3.1v1.6.9v2.0.0v2.0.1v2.0.2v2.0.3v2.0.4v2.0.5v2.0.6v2.1.0v2.1.1v2.1.1-pl1v2.1.2v2.1.3v2.1.3-pl1v2.1.4v2.1.4-pl1v2.1.5v2.1.6v2.1.7v2.1.8v2.1.8-pl1v2.1.9v2.2.0v2.2.1v2.2.10v2.2.11v2.2.13v2.2.14v2.2.15v2.2.16v2.2.17
3.7.1

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
SourceLinkDate
PoC in GitHubjpvispo/RCE-Exploit-Bolt-3.7.0-CVE-2020-4040-40412020-11-15

History

History
RecordedChangedSources
factsOSV
aliases, productsEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV, PoC in GitHub

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2020-4040 is a high vulnerability (CVSS 8.6) in Bolt, published June 8, 2020. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 1.77%, the 78th percentile. Fixed in bolt/bolt 3.7.1.

References

This page doesn't list everything

Left out here: 104 versions. The JSON record has them.

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