# CVE-2015-9544: Improper Input Validation in xdLocalStorage

> Attackers can read or modify local storage data by sending unvalidated web messages to applications using this JavaScript library.

- **Severity:** High 7.1 (`CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 7 Apr 2020
- **Updated:** 6 Aug 2024
- **Also known as:** GHSA-vrc7-6g8w-jh56

## What is CVE-2015-9544?

CVE-2015-9544 is a high-severity vulnerability in n/a, published on 7 Apr 2020. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official 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.

Weakness: CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2015-9544?

2 open source packages ship an affected version, including xdlocalstorage. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `xdlocalstorage` | npm | All versions to 2.0.5 | None |
| `xdlocalstorage` | npm | All versions to 2.0.5 | None |

Products: Cross Domain Local Storage Project Cross Domain Local Storage.

## How do I fix CVE-2015-9544?

No fix has been published for CVE-2015-9544 yet. Limit exposure of the affected software until one is available.

## Is CVE-2015-9544 being exploited?

There is no known exploitation of CVE-2015-9544 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2020-11610](https://insights.sbomify.com/CVE-2020-11610/): xdlocalstorage does not verify request origin (high 8.8)
- [CVE-2015-9545](https://insights.sbomify.com/CVE-2015-9545/): Improper Input Validation in xdLocalStorage (high 7.1)
- [CVE-2020-11611](https://insights.sbomify.com/CVE-2020-11611/): Open Redirect in xdLocalStorage (medium 6.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2015-9544 and fix it if it is affected.

What it is: CVE-2015-9544 is a high-severity vulnerability in n/a, published on 7 Apr 2020. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2015-9544 in the wild and no public exploit code.

Affected packages and fixed versions:
- xdlocalstorage (npm): affected all versions up to 2.0.5; no fix listed
- xdlocalstorage (npm): affected all versions up to 2.0.5; no fix listed

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2015-9544/ (Markdown: https://insights.sbomify.com/CVE-2015-9544/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2015-9544
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2015-9544
- OSV: https://osv.dev/vulnerability/CVE-2015-9544

---
From sbomify Insights: https://insights.sbomify.com/CVE-2015-9544/
Summaries are generated and may contain mistakes; the official description above is the record.