CVE-2021-28095

Name: CVE-2021-28095
Creator: NVD / NIST
Published: 2021-07-30T14:15:16.087+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.8/10EPSS 0.90%

Last modified Jun 17, 2026

CVE-2021-28095 is a medium-severity vulnerability rated 4.8/10 on the CVSS scale. OX Documents before 7.10.5-rev5 has Incorrect Access Control for documents that contain XML structures because hash collisions can occur, due to use of CRC32.. EPSS estimates a 0.90% chance of exploitation in the next 30 days.

Description

OX Documents before 7.10.5-rev5 has Incorrect Access Control for documents that contain XML structures because hash collisions can occur, due to use of CRC32.

Metrics

CVSS 3.1

4.8/10

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

EPSS Probability

0.90%

55.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-326

Affected Software

Vendor	Product	Versions
Open-Xchange	Open-Xchange Documents	< 7.10.5
Open-Xchange	Open-Xchange Documents	7.10.5

References

http://packetstormsecurity.com/files/163569/OX-Documents-7.10.5-Improper-Authorization.htmlThird Party Advisory, VDB Entry
http://seclists.org/fulldisclosure/2021/Jul/37Mailing List, Third Party Advisory
https://www.open-xchange.comProduct
http://packetstormsecurity.com/files/163569/OX-Documents-7.10.5-Improper-Authorization.htmlThird Party Advisory, VDB Entry
http://seclists.org/fulldisclosure/2021/Jul/37Mailing List, Third Party Advisory
https://www.open-xchange.comProduct

Timeline

Published: Jul 30, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-28095?

OX Documents before 7.10.5-rev5 has Incorrect Access Control for documents that contain XML structures because hash collisions can occur, due to use of CRC32.

How severe is CVE-2021-28095?

CVE-2021-28095 has a CVSS score of 4.8/10 (MEDIUM severity). The EPSS model estimates a 0.90% probability of exploitation in the next 30 days.

How do I fix CVE-2021-28095?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-28095?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST