CVE-2020-4040

mediumpriority · track · 28EPSS 0.018 · 78 %ileexploit · PoCEUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · PoC

Likely / severe?

1.77% (78th) EPSS

CVSS 4.3 · medium

Is it mine?

3 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · nvd · osv

EPSS · scored 2026-10-28

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

cvss

Technical severity, 0–10. One row per scoring source.

8.6

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 4.1–8.6

v2.04.3mediumAV:N/AC:M/Au:N/C:N/I:P/A:Nprimary · NVD / NIST USexploitability 8.6 · impact 2.9

v3.14.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:Nprimary · NVD / NIST USexploitability 2.8 · impact 1.4

v3.18.6highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:Nsecondary · ENISA EU

v3.18.6highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:Nsecondary · security-advisories@github.comexploitability 3.9 · impact 4

v3.18.6highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:Nsecondary · OSV

v3.14.1mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N/E:Psecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-352USprimaryCWE-352US

exploits (1)

Public proof-of-concept and weaponised exploit code.

jpvispo/RCE-Exploit-Bolt-3.7.0-CVE-2020-4040-4041jpvispo/RCE-Exploit-Bolt-3.7.0-CVE-2020-4040-4041PoC · poc_in_github

affected products (3)

Products and version ranges known to be affected.

bolt bolt≤ < 3.7.1enisa_euvdEU
boltcms bolt< 3.7.1nvdUScpe:2.3:a:boltcms:bolt:*:*:*:*:*:*:*:*
Packagist bolt/bolt< 3.7.1osvUSpkg:composer/bolt/bolt

advisories (1)

Vendor and ecosystem advisories describing this.

GHSA-2q66-6cc3-6xm8CSRF issue on preview pages in Bolt CMS2020-06-09ghsa · osvUS
### 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

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd osv NVD CVE.org MITRE

published 2020-06-08modified 2026-06-17

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+10367 more

references (16)

External citations — patches, advisories, analysis.

scry

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