Security readout for executives and security teams
Plain-English summary
Older Sketch versions could trust a library feed enough to download and open files without macOS quarantine protections. That could let an attacker turn a design-library interaction into remote code execution. The public record does not show active exploitation.
Executive priority
Treat this as a targeted endpoint risk for design teams, not an internet-wide server emergency. Prioritize patch verification where Sketch is used with external libraries.
Technical view
Sketch before version 75 allowed library feeds to auto-download and open files without the com.apple.quarantine extended attribute. This bypassed macOS file quarantine controls and was demonstrated as remote code execution using Terminal profile behavior. No CVSS score, CWE, or detailed vendor advisory is present in the supplied data.
Likely exposure
Exposure is most likely on macOS endpoints running Sketch before version 75, especially where users add or consume external Sketch library feeds. Organizations without software inventory for design tools may miss affected installations.
Exploitation context
The CVE source describes a demonstrated remote code execution path, but the record is not in CISA KEV and the supplied sources do not cite active exploitation in the wild.
Researcher notes
Evidence is limited to the CVE description and referenced public write-up/release notes. The affected range is stated as before 75, but no CVSS, CWE, CPEs, or official mitigation details beyond the version boundary are supplied.
Mitigation direction
- Upgrade Sketch to version 75 or later.
- Review Sketch release notes and vendor guidance before rollout.
- Restrict use of untrusted or externally supplied Sketch library feeds.
- Use endpoint controls to flag unexpected Terminal profile or app launches.
Validation and detection
- Inventory macOS endpoints for installed Sketch versions.
- Confirm no production systems run Sketch before version 75.
- Review Sketch library feed sources used by design teams.
- Check endpoint telemetry for suspicious auto-opened downloads from Sketch workflows.
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
Execution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-40531 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://www.sketch.com/updates/#version-75CVE reference · x_refsource_MISC
- https://jonpalmisc.com/2021/11/22/cve-2021-40531CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.