Skim: Arbitrary code execution via pull_request_target fork checkout in pr.yml
41Vexday Risk Score
No sign of exploitation. It has a public proof of concept.
ssvc Attendcvss 7.4epss 0.3%
exploitation probability
0.3%top 79% of all CVEs
observed exploitation
nono source reports it
1 public exploit(s)
Skim is a fuzzy finder designed to through files, lines, and commands. The generate-files job in .github/workflows/pr.yml checks out attacker-controlled fork code and executes it via cargo run, with access to SKIM_RS_BOT_PRIVATE_KEY and GITHUB_TOKEN (contents:write). No gates prevent exploitation - any GitHub user can trigger this by opening a pull request from a fork. This vulnerability is fixed with commit bf63404ad51985b00ed304690ba9d477860a5a75.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:N
Affected products
skim-rs · skimpublic PoCs found — 1
cve_referencedrive.google.com/file/d/1Gj7ziTK42YWXYoQgTbis_rMitHR59J6F/viewunverified⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.