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CVE-2023-5725 A malicious installed WebExtension could open arbitrary URLs, which under the right circumstance could be leveraged to…

Description

A malicious installed WebExtension could open arbitrary URLs, which under the right circumstance could be leveraged to collect sensitive user data. This vulnerability affects Firefox < 119, Firefox ESR < 115.4, and Thunderbird < 115.4.1.

Affected products and versions

Product Affected versions Fixed in
Firefox 119 earliest → < 119 119
Firefox ESR 115.4 earliest → < 115.4 115.4
Thunderbird 115.4 earliest → < 115.4.1 115.4.1

Other CVEs of Firefox

The 2221 CVEs of Firefox →
CVE-2026-120572 Incorrect boundary conditions in the Layout: Block and Inline component 8.8 High CVE-2026-118027 Frame poisoning in the Layout component 9.1 Critical CVE-2026-118025 Other issue in the SVG component 8.8 High CVE-2026-118024 Use-after-free in the Graphics: Text component 8.8 High
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