CVE-2025-62605: mastodon from 4.4.0 (inclusive), before 4.4.8 (exclusive), 4.5.0 · update beta1, >= 4.4.0-beta.1, < 4.4.8, =…

CVE-2025-62605. CVSS 3.1 base score 4.3 (MEDIUM, Vendor/CNA). EPSS 0.00286 (percentile 0.19846), scored 19-Oct-2026.

Affected technology

mastodon · from 4.4.0 (inclusive), before 4.4.8 (exclusive)
joinmastodon

mastodon · 4.5.0 · update beta1
joinmastodon

mastodon · >= 4.4.0-beta.1, < 4.4.8, = 4.5.0-beta.1
mastodon

Component: Not specified by the source

Attack conditions (Vendor/CNA, CVSS 3.1): Network (remote) · Low privileges required · No user interaction required

What an attacker can do

An attacker could reblog any post, then quote their reblog, technically quoting themselves, but having the quote feature a preview of the post they did not get authorization for with all of the affordances that would be otherwise denied by the quote controls. Vendor/CNA’s CVSS 3.1 assessment (base score 4.3/10) rates confidentiality and availability impact as none; integrity impact as low.

Published 19-Oct-2026 17:59 UTC

CWE: CWE-754
CCR priority: 17.3 /100 (P5)
CVSS 3.1: 4.3 /10 · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N · Vendor/CNA
EPSS: 0.00286 · percentile 0.19846 · 2026-10-19
KEV: no

Provenance

NVD CVE API 2.0 · Source record · observed 2026-10-19 17:57:47.606446+00:00 UTC

Stable permalink: https://cybercodered.org/item/cve-cve-2025-62605.html