Mastodon vulnerable to Stored XSS through the translation feature

Mastodon is a free, open-source social network server based on ActivityPub. In versions on the 4.x branch prior to versions 4.0.10, 4.2.8, and 4.2.0-rc2, under certain conditions, attackers can abuse the translation feature to bypass the server-side HTML sanitization, allowing unescaped HTML to execute in the browser. The impact is limited thanks to Mastodon's strict Content Security Policy, blocking inline scripts, etc. However a CSP bypass or loophole could be exploited to execute malicious XSS. Furthermore, it requires user interaction, as this can only occur upon clicking the “Translate” button on a malicious post. Versions 4.0.10, 4.2.8, and 4.2.0-rc2 contain a patch for this issue.

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

在Web页面生成时对输入的转义处理不恰当(跨站脚本)

Mastodon 跨站脚本漏洞

Mastodon是一款基于ActivityPub的开源社交网络服务器。 Mastodon 3.5.14之前、4.0.10之前、4.1.8之前、4.2.0-rc2之前版本存在跨站脚本漏洞，该漏洞源于某些情况下，攻击者可以滥用翻译功能来绕过服务器端 HTML 清理，从而允许未转义的 HTML 在浏览器中执行。

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