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CVE-2021-32724

32
FAUCET Score

CVE-2021-32724 is a critical vulnerability in the check-spelling GitHub Action, affecting repositories configured to trigger on pull_request_target or schedule. An attacker can craft a malicious Pull Request to expose the GITHUB_TOKEN, enabling unauthorized commits and potential exfiltration of repository secrets. With a CVSS score of 9.9 (CRITICAL), this vulnerability has a low attack complexity and allows for complete compromise of confidentiality, integrity, and availability. While there is no evidence of active exploitation or public exploit code, the vulnerability has garnered significant community discussion, indicating awareness and potential for future exploitation.

Impacted Technologies

VendorProductVersion(s)CPE
< 0.0.19CPE matchmatch criteria
cpe:2.3:a:check-spelling:check-spelling:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.9CRITICAL

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.1
Impact Score
6.0
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.33%
Probability of exploitation in next 30 days
EPSS Percentile
81.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0233 is in the 85th percentile among its peer group of 1,128 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 1.0 Bluesky, 0.5 Mastodon, and 1.6 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

actionspatch availablevia ghsa
Product: check-spelling/check-spellingFixed in: 0.0.19
github_advisorypatch availablevia nvd_reference
View patch

Vendor Advisories (1)

actionsGHSA-g86g-chm8-7r2pcritical

check-spelling workflow vulnerable to token leakage via symlink attack

Jul 29, 2022

References

github.com / check-spelling/check-spelling/commit/436362fc6b588d9d561cbdb575260ca593c8dc56
PatchThird Party Advisory
github.com / check-spelling/check-spelling/security/advisories/GHSA-g86g-chm8-7r2p
MitigationThird Party Advisory