Description
sysend.js is a library that allows a user to send messages between pages that are open in the same browser. Users that use cross-origin communication may have their communications intercepted. Impact is limited by the communication occurring in the same browser. This issue has been patched in sysend.js version 1.10.0. The only currently known workaround is to avoid sending communications that a user does not want to have intercepted via sysend messages.
References (4)
Core 4
Core References
Third Party Advisory x_refsource_confirm
https://github.com/jcubic/sysend.js/security/advisories/GHSA-4vvg-x86p-mvqc
Exploit, Issue Tracking, Third Party Advisory x_refsource_misc
https://github.com/jcubic/sysend.js/issues/33
Patch, Third Party Advisory x_refsource_misc
https://github.com/jcubic/sysend.js/commit/a24f4b776fb18191ae0f7e3d90c2c7bec459431a
Release Notes, Third Party Advisory x_refsource_misc
https://github.com/jcubic/sysend.js/releases/tag/1.10.0
Scores
CVSS v3
6.5
EPSS
0.0020
EPSS Percentile
41.6%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-346
CWE-200
Status
published
Products (2)
npm/sysend
0 - 1.10.0npm
sysend.js_project/sysend.js
< 1.10.0
Published
Mar 14, 2022
Tracked Since
Feb 18, 2026