CVE-2021-39184

mediumpriority · track · 34OT risk · elevatedEPSS 0.011 · 64 %ileEURUUS
grimoire priorityP3 · Track
Exploitable?
—
no known exploitation
Likely / severe?
1.05% (64th) EPSS
CVSS 5 · medium
Is it mine?
16 products
Check your exposure
Who says so?
5 sources
cnnvd · enisa_euvd · fstec_bdu · nvd

EPSS · scored 2026-10-27

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.

01

cvss

Technical severity, 0–10. One row per scoring source.

8.6
010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5–8.6

v2.05mediumAV:N/AC:L/Au:N/C:P/I:N/A:Nprimary · NVD / NIST USexploitability 10 · impact 2.9
v3.18.6highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:Nprimary · NVD / NIST USexploitability 3.9 · impact 4
v3.18.6highAV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:Nsecondary · FSTEC (BDU) RU
v3.16.8mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:Nsecondary · ENISA EU
v3.16.8mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:Nsecondary · security-advisories@github.comexploitability 2.2 · impact 4
v3.16.8mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:Nsecondary · OSV
v3.17.9highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N/E:Usecondary · CVSS-BT (t0sche)
02

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-862USprimaryCWE-668USCWE-668USCWE-668USCWE-862US
03

affected products (16)

Products and version ranges known to be affected.

04

advisories (1)

Vendor and ecosystem advisories describing this.

  • GHSA-mpjm-v997-c4h4Electron's sandboxed renderers can obtain thumbnails of arbitrary files through the nativeImage API2021-10-12ghsa · osvUS

    ### Impact This vulnerability 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. All current stable versions of Electron are affected. ### Patches This was fixed with #30728, and the following Electron versions contain the fix: - 15.0.0-alpha.10 - 14.0.0 - 13.3.0 - 12.1.0 - 11.5.0 ### Workarounds If your app enables `contextIsolation`, this vulnerability is significantly more difficult for an attacker to exploit. Further, if your app does not depend on the `createThumbnailFromPath` API, then you can simply disable the functionality. In the main process, before the 'ready' event: ```js delete require('electron').nativeImage.createThumbnailFromPath ``` ### For more information If you have any questions or comments about this advisory, email us at [security@electronjs.org](mailto:security@electronjs.org).

05

also known as (4)

Other names and identifiers for this entity.

06

sources

Which sources assert this record, and when.

cnnvdenisa_euvdfstec_bdunvdosvNVDCVE.orgMITRE
published 2021-10-12modified 2026-06-17
08

references (7)

External citations — patches, advisories, analysis.

scry

Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.

Free scan