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CVE-2021-39184
MEDIUM · CVSS 6.8
EPSS exploitation probability: 0%
Published 2021-10-12T19:15:07.987 · Last modified 2026-06-17T04:03:16.130

Summary

Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. A vulnerability in versions prior to 11.5.0, 12.1.0, and 13.3.0 allows a sandboxed renderer to request a "thumbnail" image of an arbitrary file on the user's system. The thumbnail can potentially include significant parts of the original file, including textual data in many cases. Versions 15.0.0-alpha.10, 14.0.0, 13.3.0, 12.1.0, and 11.5.0 all contain a fix for the vulnerability. Two workarounds aside from upgrading are available. One may make the vulnerability significantly more difficult for an attacker to exploit by enabling `contextIsolation` in one's app. One may also disable the functionality of the `createThumbnailFromPath` API if one does not need it.

Affected products

electronjs — electron

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.