Staging Environment: Content and features may be unstable or change without notice.
Search for vulnerabilities
Vulnerability details: VCID-k7bn-sxuk-67b6
Vulnerability ID VCID-k7bn-sxuk-67b6
Aliases CVE-2021-21423
GHSA-gg2g-m5wc-vccq
PYSEC-2021-111
Summary `projen` is a project generation tool that synthesizes project configuration files such as `package.json`, `tsconfig.json`, `.gitignore`, GitHub Workflows, `eslint`, `jest`, and more, from a well-typed definition written in JavaScript. Users of projen's `NodeProject` project type (including any project type derived from it) include a `.github/workflows/rebuild-bot.yml` workflow that may allow any GitHub user to trigger execution of un-trusted code in the context of the "main" repository (as opposed to that of a fork). In some situations, such untrusted code may potentially be able to commit to the "main" repository. The rebuild-bot workflow is triggered by comments including `@projen rebuild` on pull-request to trigger a re-build of the projen project, and updating the pull request with the updated files. This workflow is triggered by an `issue_comment` event, and thus always executes with a `GITHUB_TOKEN` belonging to the repository into which the pull-request is made (this is in contrast with workflows triggered by `pull_request` events, which always execute with a `GITHUB_TOKEN` belonging to the repository from which the pull-request is made). Repositories that do not have branch protection configured on their default branch (typically `main` or `master`) could possibly allow an untrusted user to gain access to secrets configured on the repository (such as NPM tokens, etc). Branch protection prohibits this escalation, as the managed `GITHUB_TOKEN` would not be able to modify the contents of a protected branch and affected workflows must be defined on the default branch.
Status Published
Exploitability 0.5
Weighted Severity 0.0
Risk None
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-527 Exposure of Version-Control Repository to an Unauthorized Control Sphere
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
epss 0.00672 https://api.first.org/data/v1/epss?cve=CVE-2021-21423
cvssv3.1 6.8 https://github.com/projen/projen
cvssv4 7.6 https://github.com/projen/projen
generic_textual HIGH https://github.com/projen/projen
cvssv3.1 6.8 https://github.com/projen/projen/commit/36030c6a4b1acd0054673322612e7c70e9446643
cvssv4 7.6 https://github.com/projen/projen/commit/36030c6a4b1acd0054673322612e7c70e9446643
generic_textual HIGH https://github.com/projen/projen/commit/36030c6a4b1acd0054673322612e7c70e9446643
cvssv3.1 6.8 https://github.com/projen/projen/security/advisories/GHSA-gg2g-m5wc-vccq
cvssv4 7.6 https://github.com/projen/projen/security/advisories/GHSA-gg2g-m5wc-vccq
generic_textual HIGH https://github.com/projen/projen/security/advisories/GHSA-gg2g-m5wc-vccq
cvssv3.1 6.8 https://github.com/pypa/advisory-database/tree/main/vulns/projen/PYSEC-2021-111.yaml
cvssv4 7.6 https://github.com/pypa/advisory-database/tree/main/vulns/projen/PYSEC-2021-111.yaml
generic_textual HIGH https://github.com/pypa/advisory-database/tree/main/vulns/projen/PYSEC-2021-111.yaml
cvssv3.1 6.8 https://nvd.nist.gov/vuln/detail/CVE-2021-21423
cvssv4 7.6 https://nvd.nist.gov/vuln/detail/CVE-2021-21423
generic_textual HIGH https://nvd.nist.gov/vuln/detail/CVE-2021-21423
cvssv3.1 6.8 https://www.npmjs.com/package/projen
cvssv4 7.6 https://www.npmjs.com/package/projen
generic_textual HIGH https://www.npmjs.com/package/projen
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2021-21423
https://github.com/projen/projen
https://github.com/projen/projen/commit/36030c6a4b1acd0054673322612e7c70e9446643
https://github.com/projen/projen/security/advisories/GHSA-gg2g-m5wc-vccq
https://github.com/pypa/advisory-database/tree/main/vulns/projen/PYSEC-2021-111.yaml
https://nvd.nist.gov/vuln/detail/CVE-2021-21423
https://www.npmjs.com/package/projen
GHSA-gg2g-m5wc-vccq https://github.com/advisories/GHSA-gg2g-m5wc-vccq
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N Found at https://github.com/projen/projen
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N Found at https://github.com/projen/projen
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

none

present

none

low

high

none

passive

active

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N Found at https://github.com/projen/projen/commit/36030c6a4b1acd0054673322612e7c70e9446643
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N Found at https://github.com/projen/projen/commit/36030c6a4b1acd0054673322612e7c70e9446643
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

none

present

none

low

high

none

passive

active

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N Found at https://github.com/projen/projen/security/advisories/GHSA-gg2g-m5wc-vccq
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N Found at https://github.com/projen/projen/security/advisories/GHSA-gg2g-m5wc-vccq
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

none

present

none

low

high

none

passive

active

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N Found at https://github.com/pypa/advisory-database/tree/main/vulns/projen/PYSEC-2021-111.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N Found at https://github.com/pypa/advisory-database/tree/main/vulns/projen/PYSEC-2021-111.yaml
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

none

present

none

low

high

none

passive

active

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2021-21423
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N Found at https://nvd.nist.gov/vuln/detail/CVE-2021-21423
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

none

present

none

low

high

none

passive

active

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N Found at https://www.npmjs.com/package/projen
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N Found at https://www.npmjs.com/package/projen
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

none

present

none

low

high

none

passive

active

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.71864
EPSS Score 0.00672
Published At June 11, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-11T20:48:41.492954+00:00 PyPI Importer Import https://osv-vulnerabilities.storage.googleapis.com/PyPI/all.zip 38.6.0