CVE-2026-42553

Cinny (Matrix client) before version 4.10.3 is affected by a token-disclosure vulnerability in two parts: (1) EmojiBoard fallback uses an untrusted pack.meta.avatar as a MXC URL, enabling an attacker-controlled HTTP(S) URL in a malicious emote pack; (2) the service worker attaches the user’s Auth...

CVE-2026-42553 Cinny: Access token disclosure via invalidated emoji pack avatar URL in service worker

Cinny is a Matrix client. Prior to 4.10.3, A remote authenticated attacker who shares a room with a victim and has permissions to create room emotes for example in a DM can cause the victim's client to send their Matrix access token to an attacker-controlled server. This occurs when the victim...

CVE-2026-42553

Cinny is a Matrix client. Prior to 4.10.3, A remote authenticated attacker who shares a room with a victim and has permissions to create room emotes for example in a DM can cause the victim's client to send their Matrix access token to an attacker-controlled server. This occurs when the victim...

GHSA-J944-W549-3453 Cinny vulnerable to access token disclosure via invalidated emoji pack avatar URL in service worker

Impact A remote authenticated attacker who shares a room with a victim and has permissions to create room emotes for example in a DM can cause the victim's client to send their Matrix access token to an attacker-controlled server. This occurs when the victim opens the emoji or sticker picker for...

Origin Validation Error

Overview cinny is a Yet another matrix client Affected versions of this package are vulnerable to Origin Validation Error in the process that handles emoji pack avatar URLs in the service worker. An attacker can obtain a victim's access token by crafting a malicious emote pack with an...

Pleroma Path Traversal vulnerability

A vulnerability was found in kphrx pleroma. It has been classified as problematic. This affects the function Pleroma.Emoji.Pack of the file lib/pleroma/emoji/pack.ex. The manipulation of the argument name leads to path traversal. The complexity of an attack is rather high. The exploitability is...

Pleroma Path Traversal Vulnerability

kPherox Pleroma is a microblogging server software from kPherox that can be federated exchanged messages with other servers that support ActivityPub. A path traversal vulnerability exists in Pleroma, which stems from a path traversal vulnerability in the parameter name of the function...

PT-2023-32198 · Unknown · Kphrx Pleroma

Name of the Vulnerable Software and Affected Versions: kphrx pleroma affected versions not specified Description: A vulnerability was found in kphrx pleroma, classified as problematic. It affects the function Pleroma.Emoji.Pack of the file lib/pleroma/emoji/pack.ex. The manipulation of the argume...