PT-2025-35656 · Outline · Outline

Tommoor · Published 2025-09-03 · Updated 2025-10-20 · CVE-2025-58351

Positive Technologies (AI Summary)

CVSS v3.1

6.8

Medium

Base vector

AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:N/A:N

Name of the Vulnerable Software and Affected Versions Outline versions 0.72.0 through 0.83.0

Description Outline, a collaborative documentation service, introduced a local file system storage feature in versions 0.72.0 through 0.83.0. This feature introduced a Content-Type bypass and a Cross-Site Scripting (CSP) bypass. When self-hosted and using FILE STORAGE=local on the same domain as the Outline application, a malicious payload could be uploaded as a file attachment, bypassing CSP restrictions and enabling script execution within another user’s context.

Recommendations Update to version 0.84.0 or later.

Exploit

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2025-58351

GHSA-GCJ7-C9JV-FHGF

Affected Products

Outline

References · 9

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/58xxx/CVE-2025-58351.json · Exploit
• https://github.com/outline/outline/commit/18bc93c9c207329244c6909606a2393e863892a3 · Patch
• https://github.com/outline/outline/security/advisories/GHSA-gcj7-c9jv-fhgf · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2025-58351 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-58351 · Security Note
• https://github.com/outline/outline/releases/tag/v0.84.0 · Note
• https://t.me/cveNotify/134154 · Telegram Post
• https://t.me/cveNotify/139494 · Telegram Post
• https://twitter.com/CVEnew/status/1963084259864019404 · Twitter Post