CVE-2026-97723: XSS
madpsy ka9qubersdr before 0.1.58 has a stored cross-site scripting (XSS) vulnerability in the chat message rendering functionality. User-controlled URLs in chat messages were insufficiently neutralized before being converted into HTML links. Quotation characters could break out of the generated href attribute and introduce attacker-controlled HTML attributes, allowing arbitrary JavaScript to execute in the browser of another user when the stored chat message was rendered. No click on the malicious link was required.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
madpsy/ka9q_ubersdrto a version that resolves this vulnerability.Fixed in 0.1.58
Event History
Frequently Asked Questions
Which versions should be considered affected?
Versions before 0.1.58 are affected. Upgrade to 0.1.58 or later to obtain the fix referenced by the project.
Does exploitation require an account, user interaction, or a click?
The vulnerability is rated with no privileges and no user interaction required. An attacker can submit a crafted chat message, and JavaScript can execute when another user’s browser renders the stored message; the user does not need to click the link.
Who is exposed to a malicious message?
Users whose browsers render the stored crafted chat message are exposed. The issue affects chat message rendering where user-controlled URLs are converted into HTML links.