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CVE-2023-36459— Mastodon vulnerable to Cross-site Scripting through oEmbed preview cards

Quick assessment

Affected
mastodon mastodon
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Mastodon是一款基于ActivityPub的开源社交网络服务器。 Mastodon存在跨站脚本漏洞。攻击者利用该漏洞绕过HTML清理，并在oEmbed预览卡中包含任意HTML。

CVSS 9.3 · Critical EPSS 1.22% · P66
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I. Basic Information for CVE-2023-36459

Vulnerability Information
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Vulnerability Title
Mastodon vulnerable to Cross-site Scripting through oEmbed preview cards
Source: CVE Program / CVE List V5
Vulnerability Description
Mastodon is a free, open-source social network server based on ActivityPub. Starting in version 1.3 and prior to versions 3.5.9, 4.0.5, and 4.1.3, an attacker using carefully crafted oEmbed data can bypass the HTML sanitization performed by Mastodon and include arbitrary HTML in oEmbed preview cards. This introduces a vector for cross-site scripting (XSS) payloads that can be rendered in the user's browser when a preview card for a malicious link is clicked through. Versions 3.5.9, 4.0.5, and 4.1.3 contain a patch for this issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
Mastodon 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Mastodon是一款基于ActivityPub的开源社交网络服务器。 Mastodon存在跨站脚本漏洞。攻击者利用该漏洞绕过HTML清理，并在oEmbed预览卡中包含任意HTML。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
mastodon mastodon >= 1.3, < 3.5.9 -

II. Public POCs for CVE-2023-36459

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III. Intelligence Information for CVE-2023-36459

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Patches & Fixes for CVE-2023-36459 (1)

Vendor Advisories for CVE-2023-36459 (1)

Mailing List Discussions for CVE-2023-36459 (1)

Other References for CVE-2023-36459 (3)

Same Patch Batch · mastodon · 2023-07-06 · 4 CVEs total

CVE-2023-36460 10.0 CRITICAL Mastodon vulnerable to arbitrary file creation through media attachments
CVE-2023-36461 7.5 HIGH Mastodon vulnerable to Denial of Service through slow HTTP responses
CVE-2023-36462 5.4 MEDIUM Mastodon's verified profile links can be formatted in a misleading way

IV. Related Vulnerabilities

Same product: mastodon
Same vendor: mastodon
Same weakness: CWE-79

V. Comments for CVE-2023-36459

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