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CVE-2023-36462— Mastodon's verified profile links can be formatted in a misleading way

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存在输入验证错误漏洞，该漏洞源于允许攻击者创建配置文件链接以隐藏链接的任意部分，并用于网络钓鱼。

CVSS 5.4 · Medium EPSS 0.62% · P48

Possible ATT&CK Techniques 1 AI

T1566.002 · Spearphishing Link
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I. Basic Information for CVE-2023-36462

Vulnerability Information
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Vulnerability Title
Mastodon's verified profile links can be formatted in a misleading way
Source: CVE Program / CVE List V5
Vulnerability Description
Mastodon is a free, open-source social network server based on ActivityPub. Starting in version 2.6.0 and prior to versions 3.5.9, 4.0.5, and 4.1.3, an attacker can craft a verified profile link using specific formatting to conceal arbitrary parts of the link, enabling it to appear to link to a different URL altogether. The link is visually misleading, but clicking on it will reveal the actual link. This can still be used for phishing, though, similar to IDN homograph attacks. 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:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Mastodon 输入验证错误漏洞
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存在输入验证错误漏洞，该漏洞源于允许攻击者创建配置文件链接以隐藏链接的任意部分，并用于网络钓鱼。
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 >= 2.6.0, < 3.5.9 -

II. Public POCs for CVE-2023-36462

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III. Intelligence Information for CVE-2023-36462

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Patches & Fixes for CVE-2023-36462 (1)

Vendor Advisories for CVE-2023-36462 (1)

Other References for CVE-2023-36462 (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-2023-36459 9.3 CRITICAL Mastodon vulnerable to Cross-site Scripting through oEmbed preview cards
CVE-2023-36461 7.5 HIGH Mastodon vulnerable to Denial of Service through slow HTTP responses

IV. Related Vulnerabilities

Same product: mastodon
Same vendor: mastodon
Same weakness: CWE-20

V. Comments for CVE-2023-36462

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