CVE-2023-28853— Mastodon's blind LDAP injection in login allows the attacker to leak arbitrary attributes from LDAP database
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I. Basic Information for CVE-2023-28853
Vulnerability Information
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Vulnerability Title
Mastodon's blind LDAP injection in login allows the attacker to leak arbitrary attributes from LDAP database
Source: NVD (National Vulnerability Database)
Vulnerability Description
Mastodon is a free, open-source social network server based on ActivityPub Mastodon allows configuration of LDAP for authentication. Starting in version 2.5.0 and prior to versions 3.5.8, 4.0.4, and 4.1.2, the LDAP query made during login is insecure and the attacker can perform LDAP injection attack to leak arbitrary attributes from LDAP database. This issue is fixed in versions 3.5.8, 4.0.4, and 4.1.2.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
LDAP查询中使用的特殊元素转义处理不恰当(LDAP注入)
Source: NVD (National Vulnerability Database)
Vulnerability Title
Mastodon 注入漏洞
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 2.5.0版本及之后版本存在注入漏洞，该漏洞源于在登录时的LDAP查询不安全。攻击者利用该漏洞通过LDAP注入攻击来泄露LDAP数据库的任意属性。
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-2023-28853
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- https://github.com/mastodon/mastodon/pull/24379x_refsource_MISC
- https://github.com/mastodon/mastodon/releases/tag/v4.0.4x_refsource_MISC
- https://github.com/mastodon/mastodon/releases/tag/v3.5.8x_refsource_MISC
- https://github.com/mastodon/mastodon/releases/tag/v4.1.2x_refsource_MISC
- https://github.com/mastodon/mastodon/security/advisories/GHSA-38g9-pfm9-gfqvx_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2023-28853
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-90
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ProxyAuth Addon LDAP Injection in mitmproxy - CVE-2026-40459
LDAP Injection in PAC4J - CVE-2026-40193
Maddy Mail Server: LDAP Filter Injection via Unsanitized Use - CVE-2026-0636
LDAP Injection Vulnerability in LDAPStoreHelper.java - CVE-2026-39962
LDAP injection in MISP ApacheAuthenticate when using a user-
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