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

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-12-19 · updated 2026-06-17
Weakness: CWE-80

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.

Affected products

mesosoi silverwaregames-io-issue-tracker: before 1.1.34 — fixed in 1.1.34

How to fix

Upgrade to a fixed version: mesosoi silverwaregames-io-issue-tracker 1.1.34. Check the vendor advisory for mitigations.

References

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