Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1310 CNY

100%
Buy Us a Coffee

CVE-2026-48811— FreeScout: Thread Deletion Bypasses Mailbox Access Revocation

CVSS 4.3 · Medium

Possible ATT&CK Techniques 1AI

T1530 · Data from Cloud Storage
Get alerts for future matching vulnerabilitiesLog in to subscribe

I. Basic Information for CVE-2026-48811

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
FreeScout: Thread Deletion Bypasses Mailbox Access Revocation
Source: NVD (National Vulnerability Database)
Vulnerability Description
FreeScout is a free help desk and shared inbox built with PHP's Laravel framework. Prior to 1.8.221, FreeScout allows a non-admin user to permanently delete an internal note (private thread) from any conversation, even after that user's access to the mailbox containing the conversation has been revoked. The ThreadPolicy::delete authorization policy does not verify mailbox membership, so a former team member retains destructive write access to notes they created. This vulnerability is fixed in 1.8.221.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
授权机制缺失
Source: NVD (National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
freescout-help-deskfreescout < 1.8.221 -

II. Public POCs for CVE-2026-48811

#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-48811

请登录查看更多情报信息。

Vendor Advisories for CVE-2026-48811 (1)

Same Patch Batch · freescout-help-desk · 2026-05-29 · 4 CVEs total

CVE-2026-471237.5 HIGHFreeScout: Agent Impersonation via Missing HMAC Verification on Notification Reply Message
CVE-2026-452945.3 MEDIUMFreeScout: User Account Enumeration via Password Reset Response Differentiation
CVE-2026-488104.3 MEDIUMFreeScout: Thread Edit Authorization Bypass via Missing Mailbox Check

IV. Related Vulnerabilities

Same product: freescout
Same vendor: freescout-help-desk
Same weakness: CWE-862

V. Comments for CVE-2026-48811

No comments yet

Leave a comment