CVE-2023-36462— Mastodon's verified profile links can be formatted in a misleading way
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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: NVD (National Vulnerability Database)
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: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
输入验证不恰当
Source: NVD (National Vulnerability Database)
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
II. Public POCs for CVE-2023-36462
| # | POC Description | Source Link | Shenlong Link |
|---|
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- https://github.com/mastodon/mastodon/releases/tag/v4.0.5x_refsource_MISC
- https://github.com/mastodon/mastodon/releases/tag/v4.1.3x_refsource_MISC
- https://github.com/mastodon/mastodon/releases/tag/v3.5.9x_refsource_MISC
- https://github.com/mastodon/mastodon/security/advisories/GHSA-55j9-c3mp-6fcqx_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2023-36462
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
- CVE-2026-41259
Mastodon: Insufficient verification of email addresses - CVE-2026-33869
Mastodon has a denial of service for quote authorization - CVE-2026-33868
Mastodon has a GET-Based Open Redirect via '/web/%2F<domain> - CVE-2026-27477
Mastodon has SSRF via unvalidated FASP Provider base_url - CVE-2026-27468
Mastodon may allow unconfirmed FASP to make subscriptions
Same vendor: mastodon
- CVE-2026-41259
Mastodon: Insufficient verification of email addresses - CVE-2026-33869
Mastodon has a denial of service for quote authorization - CVE-2026-33868
Mastodon has a GET-Based Open Redirect via '/web/%2F<domain> - CVE-2026-27477
Mastodon has SSRF via unvalidated FASP Provider base_url - CVE-2026-27468
Mastodon may allow unconfirmed FASP to make subscriptions
Same weakness: CWE-20
V. Comments for CVE-2023-36462
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