{"id":67507,"date":"2025-08-06T05:32:13","date_gmt":"2025-08-06T02:02:13","guid":{"rendered":"https:\/\/afaghhosting.net\/blog\/cve-2025-54879-mastodon-ldap-rate-limiting-email-confirmation-path-bypass-vulnerability\/"},"modified":"2025-08-06T05:32:13","modified_gmt":"2025-08-06T02:02:13","slug":"cve-2025-54879-mastodon-ldap-rate-limiting-email-confirmation-path-bypass-vulnerability","status":"publish","type":"post","link":"https:\/\/afaghhosting.net\/blog\/cve-2025-54879-mastodon-ldap-rate-limiting-email-confirmation-path-bypass-vulnerability\/","title":{"rendered":"CVE-2025-54879 &#8211; Mastodon LDAP Rate Limiting Email Confirmation Path Bypass Vulnerability"},"content":{"rendered":"<p><strong>CVE ID : <\/strong>CVE-2025-54879<br \/>\n<br \/>\n<strong>Published : <\/strong> Aug. 6, 2025, 12:15 a.m. | 1\u00a0hour, 29\u00a0minutes ago<br \/>\n<br \/>\n<strong>Description : <\/strong>Mastodon is a free, open-source social network server based on ActivityPub Mastodon which facilitates LDAP configuration for authentication. In versions 3.1.5 through 4.2.24, 4.3.0 through 4.3.11 and 4.4.0 through 4.4.3, Mastodon&#8217;s rate-limiting system has a critical configuration error where the email-based throttle for confirmation emails incorrectly checks the password reset path instead of the confirmation path, effectively disabling per-email limits for confirmation requests. This allows attackers to bypass rate limits by rotating IP addresses and send unlimited confirmation emails to any email address, as only a weak IP-based throttle (25 requests per 5 minutes) remains active. The vulnerability enables denial-of-service attacks that can overwhelm mail queues and facilitate user harassment through confirmation email spam. This is fixed in versions 4.2.24, 4.3.11 and 4.4.3.<br \/>\n<br \/>\n<strong>Severity:<\/strong> 5.3 | MEDIUM<br \/>\n<br \/>\nVisit the link for more details, such as CVSS details, affected products, timeline, and more&#8230;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>CVE ID : CVE-2025-54879 Published : Aug. 6, 2025, 12:15 a.m. | 1\u00a0hour, 29\u00a0minutes ago Description : Mastodon is a free, open-source social network server based on ActivityPub Mastodon which facilitates LDAP configuration for authentication. In versions 3.1.5 through 4.2.24, 4.3.0 through 4.3.11 and 4.4.0 through 4.4.3, Mastodon&#8217;s rate-limiting system has a critical configuration error &hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[26],"tags":[],"class_list":["post-67507","post","type-post","status-publish","format-standard","hentry","category-vulnerability"],"_links":{"self":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/67507","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/comments?post=67507"}],"version-history":[{"count":0,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/67507\/revisions"}],"wp:attachment":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/media?parent=67507"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/categories?post=67507"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/tags?post=67507"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}