# CVE-2022-23543: HTML attributes when attaching a YouTube link to the post

> Attackers can inject malicious HTML attributes into YouTube iframe embeds, enabling cross-site scripting attacks on the Silverware Games social network.

- **Severity:** Medium 6.3 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 19 Dec 2022
- **Updated:** 15 Apr 2025

## What is CVE-2022-23543?

CVE-2022-23543 is a medium-severity cross-site scripting vulnerability in mesosoi silverwaregames-io-issue-tracker, published on 19 Dec 2022. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Silverware Games is a social network where people can play games online. Users can attach URLs to YouTube videos, the site will generate related `<iframe>` when the post will be published. The handler has some sort of protection so non-YouTube links can't be posted, as well as HTML tags are being stripped. However, it was still possible to add custom HTML attributes (e.g. `onclick=alert("xss")`) to the `<iframe>'. This issue was fixed in the version `1.1.34` and does not require any extra actions from our members. There has been no evidence that this vulnerability was used by anyone at this time.

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation), CWE-80 (Improper Neutralization of Script-Related HTML Tags in a Web Page)

## Which versions are affected by CVE-2022-23543?

It affects 1 product.


Products: Silverwaregames Silverwaregames.

## How do I fix CVE-2022-23543?

No fix has been published for CVE-2022-23543 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-23543 being exploited?

There is no known exploitation of CVE-2022-23543 in the wild and no public exploit code.

## Other vulnerabilities in mesosoi silverwaregames-io-issue-tracker

- [CVE-2022-36072](https://insights.sbomify.com/CVE-2022-36072/): SilverwareGames.io used == for hashing instead of === (medium 5.9)
- [CVE-2023-40179](https://insights.sbomify.com/CVE-2023-40179/): Silverware Games vulnerable to account enumeration via inconsistent responses (medium 5.3)
- [CVE-2023-40182](https://insights.sbomify.com/CVE-2023-40182/): Information disclosure in silverwaregames-io-issue-tracker (low 3.7)
- [CVE-2023-29192](https://insights.sbomify.com/CVE-2023-29192/): Missing authorization in silverwaregames-io-issue-tracker (low 2.7)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-23543 and fix it if it is affected.

What it is: CVE-2022-23543 is a medium-severity cross-site scripting vulnerability in mesosoi silverwaregames-io-issue-tracker, published on 19 Dec 2022. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2022-23543 in the wild and no public exploit code.

Affected product: mesosoi silverwaregames-io-issue-tracker. No package-level version data is available, so check the vendor advisory linked from the reference page.

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-2022-23543/ (Markdown: https://insights.sbomify.com/CVE-2022-23543/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-23543
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-23543
- OSV: https://osv.dev/vulnerability/CVE-2022-23543

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From sbomify Insights: https://insights.sbomify.com/CVE-2022-23543/
Summaries are generated and may contain mistakes; the official description above is the record.