CVE-2026-75505: EspoCRM: Access control bypass in Mass Update letting regular user with Mass Update permission read any attachment
EspoCRM is an open source customer relationship management application. Prior to 10.0.2, an authenticated user with mass-update permission can supply a known attachment identifier to the mass-update functionality. The mass-update processor duplicates the attachment without checking whether the caller can read it, bypassing record-level and field-level restrictions and exposing the file contents through the copied attachment. Obtaining a valid attachment identifier may be difficult. This issue is fixed in version 10.0.2.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
EspoCRMto a version that resolves this vulnerability.Fixed in 10.0.2
Event History
Frequently Asked Questions
Who can exploit this issue?
An authenticated EspoCRM user who has Mass Update permission can exploit it. The affected behavior bypasses record-level and field-level restrictions on attachments.
What does an attacker need to retrieve a restricted attachment?
The attacker must know a valid attachment identifier and submit it through the mass-update functionality. Obtaining a valid identifier may be difficult.
Which versions are affected and how should it be remediated?
EspoCRM versions prior to 10.0.2 are affected. Upgrade to version 10.0.2 to apply the fix.