What’s Vulnerable › Vulnerabilities

CVE-2021-28094

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-07-30 · updated 2026-06-17
• Weakness: CWE-326

Description

OX Documents before 7.10.5-rev7 has Incorrect Access Control for converted documents because hash collisions can occur, due to use of CRC32.

Affected products

• Open-Xchange Documents: before 7.10.5; 7.10.5, 7.10.5-revision1, 7.10.5-revision2, 7.10.5-revision3, 7.10.5-revision4, 7.10.5-revision5 (+1) — fixed in 7.10.5

How to fix

Upgrade to a fixed version: Open-Xchange Documents 7.10.5. Check the vendor advisory for mitigations.

References

• http://packetstormsecurity.com/files/163569/OX-Documents-7.10.5-Improper-Authorization.html
• http://seclists.org/fulldisclosure/2021/Jul/37
• https://www.open-xchange.com
• http://packetstormsecurity.com/files/163569/OX-Documents-7.10.5-Improper-Authorization.html
• http://seclists.org/fulldisclosure/2021/Jul/37
• https://www.open-xchange.com

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