CVE-2026-33656 | EspoCRM up to 9.3.3 getFilePath sourceId path traversal

VDB-359055 · CVE-2026-33656 · GCVE-0-2026-33656 ESPOCRM UP TO 9.3.3 GETFILEPATH SOURCEID PATH TRAVERSAL HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 6.8 $0-$5k 2.00+ Summaryinfo A vulnerability marked as critical has been reported in EspoCRM up to 9.3.3. This issue affects the function EspoUploadDir::getFilePath. Performing a manipulation of the argument sourceId results in path traversal. This vulnerability is known as CVE-2026-33656. Remote exploitation of the attack is possible. No exploit is available. It is suggested to upgrade the affected component. Detailsinfo A vulnerability classified as critical has been found in EspoCRM up to 9.3.3. This affects the function EspoUploadDir::getFilePath. The manipulation of the argument sourceId with an unknown input leads to a path traversal vulnerability. CWE is classifying the issue as CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is: EspoCRM is an open source customer relationship management application. Prior to version 9.3.4, EspoCRM's built-in formula scripting engine allowing updating attachment's sourceId thus allowing an authenticated admin to overwrite the `sourceId` field on `Attachment` entities. Because `sourceId` is concatenated directly into a file path with no sanitization in `EspoUploadDir::getFilePath()`, an attacker can redirect any file read or write operation to an arbitrary path within the web server's `open_basedir` scope. Version 9.3.4 fixes the issue. It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-33656 since 03/23/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. The exploitation requires an enhanced level of successful authentication. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1006 according to MITRE ATT&CK. Upgrading to version 9.3.4 eliminates this vulnerability. Productinfo Name EspoCRM Version 9.3.0 9.3.1 9.3.2 9.3.3 License open-source Website Product: https://github.com/espocrm/espocrm/ CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 6.9 VulDB Meta Temp Score: 6.8 VulDB Base Score: 4.7 VulDB Temp Score: 4.5 VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA Base Score: 9.1 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: Path traversal CWE: CWE-22 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: EspoCRM 9.3.4 Timelineinfo 03/23/2026 CVE reserved 04/22/2026 +29 days Advisory disclosed 04/22/2026 +0 days VulDB entry created 04/22/2026 +0 days VulDB entry last update Sourcesinfo Product: github.com Advisory: github.com Status: Confirmed CVE: CVE-2026-33656 (🔒) GCVE (CVE): GCVE-0-2026-33656 GCVE (VulDB): GCVE-100-359055 Entryinfo Created: 04/22/2026 22:30 Changes: 04/22/2026 22:30 (64) Complete: 🔍 Cache ID: 99:9D1:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸