CVE-2025-67500— Mastodon Error Handling Discrepancy Enables Private Status Existence Enumeration
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I. Basic Information for CVE-2025-67500
Vulnerability Information
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Vulnerability Title
Mastodon Error Handling Discrepancy Enables Private Status Existence Enumeration
Source: NVD (National Vulnerability Database)
Vulnerability Description
Mastodon is a free, open-source social network server based on ActivityPub. Versions 4.2.27 and prior, 4.3.0-beta.1 through 4.3.14, 4.4.0-beta.1 through 4.4.9, 4.5.0-beta.1 through 4.5.2 have discrepancies in error handling which allow checking whether a given status exists by sending a request with a non-English Accept-Language header. Using this behavior, an attacker who knows the identifier of a particular status they are not allowed to see can confirm whether this status exists or not. This cannot be used to learn the contents of the status or any other property besides its existence. This issue is fixed in versions 4.2.28, 4.3.15, 4.4.10 and 4.5.3.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
响应差异性信息暴露
Source: NVD (National Vulnerability Database)
Vulnerability Title
Mastodon 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Mastodon是Mastodon开源的一款基于ActivityPub的开源社交网络服务器。 Mastodon存在安全漏洞，该漏洞源于错误处理不一致，可能导致状态存在性泄露。以下版本受到影响：4.2.27及之前版本、4.3.0-beta.1版本至4.3.14版本、4.4.0-beta.1版本至4.4.9版本和4.5.0-beta.1版本至4.5.2版本。
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-2025-67500
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- https://github.com/mastodon/mastodon/security/advisories/GHSA-gwhw-gcjx-72v8x_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2025-67500
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-204
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Username Enumeration via Email OTP Flow in Multiple WSO2 Pro - CVE-2026-8242
Industrial Application Software IAS Canias ERP Login RMI doA - CVE-2026-20195
Cisco Identity Services Engine Observable Response Discrepan - CVE-2026-24468
OpenAEV Vulnerable to Username/Email Enumeration Through Dif - CVE-2026-34264
Information Disclosure vulnerability in SAP Human Capital Ma
V. Comments for CVE-2025-67500
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