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Joinmastodon MastodonMastodon: Insufficient verification of email addresses

Risk 43
Severity
8.2
First published (updated )
CVE-2026-41259

Joinmastodon MastodonMastodon has a denial of service for quote authorization

Risk 32
Severity
4.8
First published (updated )
CVE-2026-33869

Joinmastodon MastodonMastodon has a GET-Based Open Redirect via '/web/%2F<domain>'

Risk 38
Severity
6.1
First published (updated )
CVE-2026-33868

Joinmastodon MastodonMastodon has SSRF via unvalidated FASP Provider base_url

Risk 26
Severity
5.9
EPSS
0.05%
First published (updated )
CVE-2026-27477

Joinmastodon MastodonMastodon may allow unconfirmed FASP to make subscriptions

Risk 38
Severity
8.2
EPSS
0.05%
First published (updated )
CVE-2026-27468
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Joinmastodon MastodonMastodon's signature-dependent ActivityPub collection responses cached under signature-independent keys (Web Cache Poisoning via `Rails.cache`)

Risk 28
Severity
6.5
EPSS
0.05%
First published (updated )
CVE-2026-25540

Joinmastodon MastodonMastodon has insufficient access control to push notification settings

Risk 28
Severity
6.5
EPSS
0.03%
First published (updated )
CVE-2026-23964

Joinmastodon MastodonMastodon missing length limits on list names, filter names, and filter keywords

Risk 27
Severity
6.5
EPSS
0.05%
First published (updated )
CVE-2026-23963

MastodonMastodon vulnerable to Denial of Service from a single post (client/server)

Risk 31
Severity
7.5
EPSS
0.02%
First published (updated )
CVE-2026-23962

Joinmastodon MastodonMastodon may allow a remote suspension bypass

Risk 19
Severity
5.3
EPSS
0.05%
First published (updated )
CVE-2026-23961
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MastodonLocal Mastodon users can enumerate and access severed relationships of every other local user

Risk 27
Severity
6.5
EPSS
0.03%
First published (updated )
CVE-2026-22246

Joinmastodon MastodonMastodon has SSRF Protection bypass

Risk 31
Severity
7.5
EPSS
0.03%
First published (updated )
CVE-2026-22245

Joinmastodon MastodonMastodon Error Handling Discrepancy Enables Private Status Existence Enumeration

Risk 20
Severity
3.7
First published (updated )
CVE-2025-67500

Joinmastodon MastodonMastodon quotes control can be bypassed

Risk 22
Severity
4.3
First published (updated )
CVE-2025-62605

Joinmastodon MastodonMastadon streaming server allows OAuth clients without the `read` scope to subscribe to public channels

Risk 22
Severity
4.3
First published (updated )
CVE-2025-62176
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Joinmastodon MastodonMastodon streaming API fails to disconnect disabled and suspended users

Risk 22
Severity
4.3
First published (updated )
CVE-2025-62175

Joinmastodon MastodonMastodon allows continued access after password reset via CLI

Risk 19
Severity
3.5
First published (updated )
CVE-2025-62174

Joinmastodon MastodonMastodon e‑mail throttle misconfiguration allows unlimited email confirmations against unconfirmed emails

Risk 43
Severity
7.5
First published (updated )
CVE-2025-54879

Joinmastodon MastodonMastodon's domain blocks & rationales ignore user approval when visibility set as "users"

Risk 19
Severity
5.3
EPSS
0.05%
First published (updated )
CVE-2025-27399

Joinmastodon MastodonMastodon's rate-limits are missing on `/auth/setup`

Risk 19
Severity
5.3
EPSS
0.05%
First published (updated )
CVE-2025-27157
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Joinmastodon MastodonXSS

Risk 43
Severity
7.5
First published (updated )
CVE-2023-49952

Joinmastodon MastodonIn Mastodon 4.1.6, API endpoint rate limiting can be bypassed by setting a crafted HTTP request head…

Risk 42
Severity
5.9
First published (updated )
CVE-2024-34535

Joinmastodon MastodonMastodon has improper authorship check on audience extension for existing posts

Risk 54
Severity
8.2
First published (updated )
CVE-2024-37903

Joinmastodon MastodonLack of media type verification of Activity Streams objects allows impersonation of remote accounts

Risk 40
Severity
8.5
EPSS
0.04%
First published (updated )
CVE-2024-25623

Joinmastodon MastodonDestroying OAuth Applications doesn't notify Streaming of Access Tokens being destroyed in mastodon

Risk 16
Severity
4.3
EPSS
0.04%
First published (updated )
CVE-2024-25619
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Joinmastodon MastodonExternal OpenID Connect Account Takeover by E-Mail Change in mastodon

Risk 41
Severity
7.4
EPSS
0.04%
First published (updated )
CVE-2024-25618

Joinmastodon MastodonMastodon Remote user impersonation and takeover

Risk 63
Severity
9.8
EPSS
0.10%
First published (updated )
CVE-2024-23832

Joinmastodon MastodonMastodon vulnerable to Stored XSS through the translation feature

Risk 38
Severity
6.1
First published (updated )
CVE-2023-42452

Joinmastodon MastodonMastodon Invalid Domain Name Normalization vulnerability

Risk 43
Severity
7.5
First published (updated )
CVE-2023-42451

Joinmastodon MastodonMastodon Server-Side Request Forgery vulnerability

Risk 43
Severity
7.5
First published (updated )
CVE-2023-42450
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