High severity7.6NVD Advisory· Published Nov 23, 2020· Updated Jun 17, 2026
CVE-2020-26239
CVE-2020-26239
Description
Scratch Addons is a WebExtension that supports both Chrome and Firefox. Scratch Addons before version 1.3.2 is vulnerable to DOM-based XSS. If the victim visited a specific website, the More Links addon of the Scratch Addons extension used incorrect regular expression which caused the HTML-escaped values to be unescaped, leading to XSS. Scratch Addons version 1.3.2 fixes the bug. The extension will be automatically updated by the browser. More Links addon can be disabled via the option of the extension.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
3<1.3.2+ 1 more
- (no CPE)range: <1.3.2
- (no CPE)range: < 1.3.2
Patches
Vulnerability mechanics
References
4- github.com/ScratchAddons/ScratchAddons/commit/b9a52d6532c8514254c7cc1d8e18710dbedc41ffnvdPatchThird Party Advisory
- github.com/ScratchAddons/ScratchAddons/security/advisories/GHSA-6qfq-px3r-xj4pnvdPatchThird Party Advisory
- github.com/ScratchAddons/ScratchAddons/blob/a471893df403f86c9182970678175d4772a0690c/addons/more-links/userscript.jsnvdThird Party Advisory
- github.com/ScratchAddons/ScratchAddons/releases/tag/v1.3.2nvdRelease NotesThird Party Advisory
News mentions
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