Description
SVGO, short for SVG Optimizer, is a Node.js library and command-line application for optimizing SVG files. From version 1.0.0 until versions 2.8.3, 3.3.4, and 4.0.2, the removeScripts plugin, named removeScriptElement in versions 1 through 3, can leave executable content in optimized SVGs because it does not remove namespaced or prefixed script elements such as <svg:script> and, in versions 3 and 4, matches JavaScript URIs case sensitively. Applications that process untrusted SVG input with this plugin enabled and serve the result can allow scripts to execute when another user opens the SVG, exposing local storage or cookies. This issue is fixed in versions 2.8.3, 3.3.4, and 4.0.2.
References7
- github.com/svg/svgo/commit/628e3bc7336625a30365d0a9b60185307d85…
- github.com/svg/svgo/commit/72a23886b4698b27624b936f3a15a80afd36…
- github.com/svg/svgo/commit/f529cfccc6c154d6f6eabe276ec637a8c5db…
- github.com/svg/svgo/releases/tag/v2.8.3
- github.com/svg/svgo/releases/tag/v3.3.4
- github.com/svg/svgo/releases/tag/v4.0.2
- github.com/svg/svgo/security/advisories/GHSA-2p49-hgcm-8545
Metrics
- CVSS 3.1
-
8.2
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N - EPSS — exploit probability
- 0% percentile: 38 · as of 12 November 2026
- CWE
- CWE-79CWE-184
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.