Path Traversal in Espocrm
CVE-2026-33656
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.
Vulnerability class: Path Traversal (Directory Traversal)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.005 (42.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 43rd percentile — 42.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.005 · change: -0.001
Affected products
- Espocrm — versions < 9.3.4
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/espocrm/espocrm/security/advisories/GHSA-7922-x7cf-j54x (Exploit, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-33656?
- CVE-2026-33656 is a critical-severity vulnerability in Espocrm, classified under Path Traversal. CVSS score: 9.1/10. Published 2026-04-22.
- How severe is CVE-2026-33656?
- Critical severity. CVSS v3 base score is 9.1 out of 10.
- Is CVE-2026-33656 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.