CVE-2026-33656

publishedCWE-22

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.

Technical severity9.1 criticalCVSS 3.1 · NVD: [email protected]

Published2026-04-22Source updated 2026-11-11

Collected2026-11-121 attributed source

Fixes and workarounds

No remediation reported in collected sources.

Missing remediation information is not evidence that no patch exists.

Affected products and versions

Affected products, source version ranges and reporting authorities
Product	Versions	Authority
espocrm espocrm	< 9.3.4 (affected, custom)	NVD

Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.

NVD applicability configurations (1)

These expressions retain AND/OR operators, negation, and required environmental products. A listed product is not sufficient to establish exposure when additional conditions apply.

[
  {
    "negate": false,
    "nodes": [
      {
        "cpeMatch": [
          {
            "criteria": "cpe:2.3:a:espocrm:espocrm:*:*:*:*:*:*:*:*",
            "versionEndExcluding": "9.3.4",
            "vulnerable": true
          }
        ],
        "negate": false,
        "operator": "OR"
      }
    ],
    "operator": "OR"
  }
]

CVSS assessments

CVSS scores, vectors and reporting authorities
Version / score	Vector	Authority
3.1 / 9.1 critical	`CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H`	NVD: [email protected]

Exploit evidence

https://github.com/espocrm/espocrm/security/advisories/GHSA-7922-x7cf-j54x
exploit · [email protected]
https://github.com/espocrm/espocrm/security/advisories/GHSA-7922-x7cf-j54x
exploit · 134c704f-9b21-4f2e-91b3-4a467353bcc0

References

https://github.com/espocrm/espocrm/security/advisories/GHSA-7922-x7cf-j54x[email protected] · Exploit, Vendor Advisory
https://github.com/espocrm/espocrm/security/advisories/GHSA-7922-x7cf-j54x134c704f-9b21-4f2e-91b3-4a467353bcc0 · Exploit, Vendor Advisory

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