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CVE-2021-28095

18
FAUCET Score

CVE-2021-28095 describes an Incorrect Access Control vulnerability in OX Documents before version 7.10.5-rev5, affecting documents with XML structures due to hash collisions from CRC32 usage. With a CVSS score of 4.8 (Medium), this vulnerability can be exploited remotely with high attack complexity, potentially leading to limited confidentiality and integrity impacts without user interaction. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 7.10.5CPE matchmatch criteria
cpe:2.3:a:open-xchange:open-xchange_documents:*:*:*:*:*:*:*:*
7.10.5CPE matchmatch criteria
cpe:2.3:a:open-xchange:open-xchange_documents:7.10.5:-:*:*:*:*:*:*
7.10.5CPE matchmatch criteria
cpe:2.3:a:open-xchange:open-xchange_documents:7.10.5:revision1:*:*:*:*:*:*
7.10.5CPE matchmatch criteria
cpe:2.3:a:open-xchange:open-xchange_documents:7.10.5:revision2:*:*:*:*:*:*
7.10.5CPE matchmatch criteria
cpe:2.3:a:open-xchange:open-xchange_documents:7.10.5:revision3:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

4.8MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.2
Impact Score
2.5
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.90%
Probability of exploitation in next 30 days
EPSS Percentile
56.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0090 is in the 13th percentile among its peer group of 19,958 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

packetstormsecurity.com / files/163569/OX-Documents-7.10.5-Improper-Authorization.html
Third Party AdvisoryVDB Entry
seclists.org / fulldisclosure/2021/Jul/37
Mailing ListThird Party Advisory
open-xchange.com
Product