CVE-2026-25808

Hollo is a federated single-user microblogging software designed to be federated through ActivityPub. Prior to 0.6.20 and 0.7.2, there is a security vulnerability where DMs and followers-only posts were exposed through the ActivityPub outbox endpoint without authorization. This vulnerability is...

CVE-2026-25808

Hollo (federated single-user microblogging) is affected by a vulnerability in the ActivityPub outbox that exposed DMs and followers-only posts prior to version 0.6.20 and 0.7.2. The issue is resolved in those versions (0.6.20 and 0.7.2). The CVSS is provided (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N; ...

CVE-2026-25808 Hollo DMs get leaked and can be seen on Webfinger Browser

Hollo is a federated single-user microblogging software designed to be federated through ActivityPub. Prior to 0.6.20 and 0.7.2, there is a security vulnerability where DMs and followers-only posts were exposed through the ActivityPub outbox endpoint without authorization. This vulnerability is...

CVE-2025-53941

Hollo is a federated single-user microblogging software designed to be federated through ActivityPub. Versions prior to 0.6.5 allow HTML form elements to be submitted, making the software vulnerable to HTML injection. Version 0.6.5 fixes the issue...

CVE-2025-53941

Hollo is a federated single-user microblogging software designed to be federated through ActivityPub. Versions prior to 0.6.5 allow HTML form elements to be submitted, making the software vulnerable to HTML injection. Version 0.6.5 fixes the issue...

CVE-2025-53941 Hollo renders posts received with form elements and allows submission

Hollo is a federated single-user microblogging software designed to be federated through ActivityPub. Versions prior to 0.6.5 allow HTML form elements to be submitted, making the software vulnerable to HTML injection. Version 0.6.5 fixes the issue...

CVE-2025-53941 Hollo renders posts received with form elements and allows submission

Hollo is a federated single-user microblogging software designed to be federated through ActivityPub. Versions prior to 0.6.5 allow HTML form elements to be submitted, making the software vulnerable to HTML injection. Version 0.6.5 fixes the issue...

PT-2025-29913 · Hollo · Hollo

Name of the Vulnerable Software and Affected Versions: Hollo versions prior to 0.6.5 Description: Hollo is a federated single-user microblogging software designed to be federated through ActivityPub. Versions prior to 0.6.5 allow HTML form elements to be submitted, leading to a potential HTML...