CVE-2025-54888

Fedify is a TypeScript library for building federated server apps powered by ActivityPub. In versions below 1.3.20, 1.4.0-dev.585 through 1.4.12, 1.5.0-dev.636 through 1.5.4, 1.6.0-dev.754 through 1.6.7, 1.7.0-pr.251.885 through 1.7.8 and 1.8.0-dev.909 through 1.8.4, an authentication bypass...

@fedify/redis (>=0.1.0-dev.4, <=0.1.1) potentially affected by CVE-2025-54888 via @fedify/fedify (0.10.2)

@fedify/fedify NPM version 0.10.2 is affected by a known vulnerability. The following packages have a transitive dependency on @fedify/fedify and may be impacted: - @fedify/redis =0.1.0-dev.4, =0.1.1 Source cves: CVE-2025-54888 Source advisory: MEND:CVE-2025-54888...

@fedify/botkit (>=0.3.0-dev.125, <=0.3.0-dev.131) potentially affected by CVE-2025-54888 via @fedify/fedify (1.8.1-dev.1262)

@fedify/fedify NPM version 1.8.1-dev.1262 is affected by a known vulnerability. The following packages have a transitive dependency on @fedify/fedify and may be impacted: - @fedify/botkit =0.3.0-dev.125, =0.3.0-dev.131 Source cves: CVE-2025-54888 Source advisory: MEND:CVE-2025-54888...

CVE-2025-54888: Improper Authentication

Fedify is a TypeScript library for building federated server apps powered by ActivityPub. In versions below 1.3.20, 1.4.0-dev.585 through 1.4.12, 1.5.0-dev.636 through 1.5.4, 1.6.0-dev.754 through 1.6.7, 1.7.0-pr.251.885 through 1.7.8 and 1.8.0-dev.909 through 1.8.4, an authentication bypass...

Fedify security vulnerabilities

Fedify is a TypeScript library by the individual developer Hong Minhee. It is used to build federated server applications supported by ActivityPub and other standards. A security vulnerability exists in Fedify that stems from an authentication bypass that could lead to arbitrary ActivityPub role...

@fedify/botkit (>=0.3.0-dev.125, <=0.3.0-dev.131) potentially affected by CVE-2025-54888 via @fedify/fedify (1.8.1-dev.1262)

@fedify/fedify NPM version 1.8.1-dev.1262 is affected by a known vulnerability. The following packages have a transitive dependency on @fedify/fedify and may be impacted: - @fedify/botkit =0.3.0-dev.125, =0.3.0-dev.131 Source cves: CVE-2025-54888 Source advisory: GHSA-6JCC-XGCR-Q3H4...

@fedify/amqp (0.2.0-dev.12), @fedify/postgres (>=0.3.0-dev.20, <=0.3.0) +1 more potentially affected by CVE-2025-54888 via @fedify/fedify (>=1.5.0-dev.732, <=1.5.0)

@fedify/fedify NPM version =1.5.0-dev.732, =0.3.0-dev.20, =0.4.0-dev.18, =0.4.0 Source cves: CVE-2025-54888 Source advisory: GHSA-6JCC-XGCR-Q3H4...

@fedify/botkit (>=0.3.0-dev.125, <=0.3.0-dev.131) potentially affected by CVE-2025-54888 via @fedify/fedify (1.8.1-dev.1262)

@fedify/fedify NPM version 1.8.1-dev.1262 is affected by a known vulnerability. The following packages have a transitive dependency on @fedify/fedify and may be impacted: - @fedify/botkit =0.3.0-dev.125, =0.3.0-dev.131 Source cves: CVE-2025-54888 Source advisory: OSV:GHSA-6JCC-XGCR-Q3H4...

@fedify/amqp (0.2.0-dev.12), @fedify/postgres (>=0.3.0-dev.20, <=0.3.0) +1 more potentially affected by CVE-2025-54888 via @fedify/fedify (>=1.5.0-dev.732, <=1.5.0)

@fedify/fedify NPM version =1.5.0-dev.732, =0.3.0-dev.20, =0.4.0-dev.18, =0.4.0 Source cves: CVE-2025-54888 Source advisory: OSV:GHSA-6JCC-XGCR-Q3H4...

@fedify/fedify has Improper Authentication and Incorrect Authorization

Summary An authentication bypass vulnerability allows any unauthenticated attacker to impersonate any ActivityPub actor by sending forged activities signed with their own keys. Activities are processed before verifying the signing key belongs to the claimed actor, enabling complete actor...

Hollo security vulnerabilities

Hollo is a micro-blogging software from Fedify Open Source. A security vulnerability exists in versions of Hollo prior to 0.6.5 that stems from allowing submission of HTML form elements, which may result in HTML injection...

Server-Side Request Forgery (SSRF)

Fedify is vulnerable to Server-Side Request Forgery SSRF. The vulnerability is due to improper validation of the Webfinger mechanism, allowing attackers to perform GET requests to internal resources, cause denial of service via infinite loops, or execute blind SSRF attacks...

Infinite loop and Blind SSRF found inside the Webfinger mechanism in @fedify/fedify

Summary This vulnerability allows a user to maneuver the Webfinger mechanism to perform a GET request to any internal resource on any Host, Port, URL combination regardless of present security mechanisms, and forcing the victim’s server into an infinite loop causing Denial of Service. Moreover,...

GHSA-C59P-WQ67-24WX Infinite loop and Blind SSRF found inside the Webfinger mechanism in @fedify/fedify

Summary This vulnerability allows a user to maneuver the Webfinger mechanism to perform a GET request to any internal resource on any Host, Port, URL combination regardless of present security mechanisms, and forcing the victim’s server into an infinite loop causing Denial of Service. Moreover,...

CVE-2025-23221

Fedify is a TypeScript library for building federated server apps powered by ActivityPub and other standards. This vulnerability allows a user to maneuver the Webfinger mechanism to perform a GET request to any internal resource on any Host, Port, URL combination regardless of present security...

CVE-2025-23221 Fedify has an Infinite loop and Blind SSRF found inside the Webfinger mechanism

Fedify is a TypeScript library for building federated server apps powered by ActivityPub and other standards. This vulnerability allows a user to maneuver the Webfinger mechanism to perform a GET request to any internal resource on any Host, Port, URL combination regardless of present security...

CVE-2025-23221 Fedify has an Infinite loop and Blind SSRF found inside the Webfinger mechanism

Fedify is a TypeScript library for building federated server apps powered by ActivityPub and other standards. This vulnerability allows a user to maneuver the Webfinger mechanism to perform a GET request to any internal resource on any Host, Port, URL combination regardless of present security...

CVE-2025-23221

Summary: CVE-2025-23221 affects Fedify’s Webfinger handling, enabling an attacker to abuse lookupWebFinger to trigger an endless redirect loop and potential Blind SSRF, leading to Denial of Service. Multiple sources (Red Hat, NVD/NVD-like entries, OSV, GHSA advisories, Veracode) describe the issu...

CVE-2025-23221 Fedify has an Infinite loop and Blind SSRF found inside the Webfinger mechanism

Fedify is a TypeScript library for building federated server apps powered by ActivityPub and other standards. This vulnerability allows a user to maneuver the Webfinger mechanism to perform a GET request to any internal resource on any Host, Port, URL combination regardless of present security...

PT-2025-4859

Name of the Vulnerable Software and Affected Versions Fedify versions prior to 1.0.14 Fedify versions prior to 1.1.11 Fedify versions prior to 1.2.11 Fedify versions prior to 1.3.4 Description This issue allows a user to manipulate the Webfinger mechanism, performing a GET request to any internal...