CVE-2023-26428

Name: CVE-2023-26428
Creator: NVD / NIST
Published: 2023-06-20T08:15:09.163+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 0.98%

Last modified Jun 17, 2026

CVE-2023-26428 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. Attackers can successfully request arbitrary snippet IDs, including E-Mail signatures of other users within the same context. Signatures of other users could be read even though they are not explicitly shared. EPSS estimates a 0.98% chance of exploitation in the next 30 days.

Description

Attackers can successfully request arbitrary snippet IDs, including E-Mail signatures of other users within the same context. Signatures of other users could be read even though they are not explicitly shared. We improved permission handling when requesting snippets that are not explicitly shared with other users. No publicly available exploits are known.

Metrics

CVSS 3.1

6.5/10

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

EPSS Probability

0.98%

57.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Open-Xchange	Open-Xchange Appsuite Backend	< 7.10.6
Open-Xchange	Open-Xchange Appsuite Backend	>= 8.0.0, < 8.11.0
Open-Xchange	Open-Xchange Appsuite Backend	7.10.6

References

http://packetstormsecurity.com/files/173083/OX-App-Suite-SSRF-Resource-Consumption-Command-Injection.htmlThird Party Advisory, VDB Entry
http://seclists.org/fulldisclosure/2023/Jun/8Mailing List, Third Party Advisory
https://documentation.open-xchange.com/appsuite/security/advisories/csaf/2023/oxas-adv-2023-0002.json
https://software.open-xchange.com/products/appsuite/doc/Release_Notes_for_Patch_Release_6219_7.10.6_2023-03-20.pdfRelease Notes
http://packetstormsecurity.com/files/173083/OX-App-Suite-SSRF-Resource-Consumption-Command-Injection.htmlThird Party Advisory, VDB Entry
http://seclists.org/fulldisclosure/2023/Jun/8Mailing List, Third Party Advisory
https://documentation.open-xchange.com/appsuite/security/advisories/csaf/2023/oxas-adv-2023-0002.json
https://software.open-xchange.com/products/appsuite/doc/Release_Notes_for_Patch_Release_6219_7.10.6_2023-03-20.pdfRelease Notes

Timeline

Published: Jun 20, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-26428?

How severe is CVE-2023-26428?

CVE-2023-26428 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.98% probability of exploitation in the next 30 days.

How do I fix CVE-2023-26428?

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-2023-26428?

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

Scan your code now

Source: NVD / NIST