CVE-2026-40592 | freescout-help-desk freescout up to 1.8.213 Conversation undo-reply authorization (GHSA-674v-r6xp-mvp6)

VDB-358541 · CVE-2026-40592 · GHSA-674V-R6XP-MVP6 FREESCOUT-HELP-DESK FREESCOUT UP TO 1.8.213 CONVERSATION UNDO-REPLY AUTHORIZATION HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 4.9 $0-$5k 1.45+ Summaryinfo A vulnerability, which was classified as problematic, has been found in freescout-help-desk freescout up to 1.8.213. The impacted element is an unknown function of the file /conversation/undo-reply/ of the component Conversation Handler. The manipulation leads to authorization. This vulnerability is documented as CVE-2026-40592. The attack can be initiated remotely. There is not any exploit available. It is advisable to upgrade the affected component. Detailsinfo A vulnerability was found in freescout-help-desk freescout up to 1.8.213. It has been rated as problematic. This issue affects an unknown functionality of the file /conversation/undo-reply/ of the component Conversation Handler. The manipulation with an unknown input leads to a authorization vulnerability. Using CWE to declare the problem leads to CWE-862. The product does not perform an authorization check when an actor attempts to access a resource or perform an action. Impacted is integrity, and availability. The summary by CVE is: FreeScout is a free self-hosted help desk and shared mailbox. Prior to version 1.8.214, the undo-send route `GET /conversation/undo-reply/{thread_id}` checks only whether the current user can view the parent conversation. It does not verify that the current user created the reply being undone. In a shared mailbox, one agent can therefore recall another agent's just-sent reply during the 15-second undo window. Version 1.8.214 fixes the vulnerability. The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-40592 since 04/14/2026. The exploitation is known to be difficult. The attack may be initiated remotely. Technical details are known, but no exploit is available. Upgrading to version 1.8.214 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch c779afdda86fa00a4b85779e034bbfd9ce20c76d is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version. Productinfo Vendor freescout-help-desk Name freescout Version 1.8.213 License open-source Website Product: https://github.com/freescout-help-desk/freescout/ CPE 2.3info 🔒 CPE 2.2info 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 5.1 VulDB Meta Temp Score: 4.9 VulDB Base Score: 4.2 VulDB Temp Score: 4.0 VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA Base Score: 5.9 CNA Vector (GitHub_M): 🔒 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Authorization CWE: CWE-862 / CWE-863 / CWE-285 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: Upgrade Status: 🔍 0-Day Time: 🔒 Upgrade: freescout 1.8.214 Patch: c779afdda86fa00a4b85779e034bbfd9ce20c76d Timelineinfo 04/14/2026 CVE reserved 04/21/2026 +7 days Advisory disclosed 04/21/2026 +0 days VulDB entry created 04/21/2026 +0 days VulDB entry last update Sourcesinfo Product: github.com Advisory: GHSA-674v-r6xp-mvp6 Status: Confirmed CVE: CVE-2026-40592 (🔒) GCVE (CVE): GCVE-0-2026-40592 GCVE (VulDB): GCVE-100-358541 Entryinfo Created: 04/21/2026 19:44 Changes: 04/21/2026 19:44 (68) Complete: 🔍 Cache ID: 99:284:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸