Auth bypass in Open-Xchange Appsuite Backend
CVE-2023-26428
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.
Vulnerability class: IDOR (Insecure Direct Object Reference)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.010 (60.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 61st percentile — 60.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000
Affected products
- Open-Xchange Appsuite Backend — versions 7.10.6
- Ox Software Gmbh App Suite — versions 0
Weakness classification (CWE)
References
- software.open-xchange.com/products/appsuite/doc/Release_Notes_for_Patch_Release… (release-notes, Release Notes)
- documentation.open-xchange.com/appsuite/security/advisories/csaf/2023/oxas-adv-… (vendor-advisory)
- seclists.org/fulldisclosure/2023/Jun/8 (Mailing List, Third Party Advisory)
- packetstormsecurity.com/files/173083/OX-App-Suite-SSRF-Resource-Consumption-Com… (VDB Entry, Third Party Advisory)
Frequently asked questions
- What is CVE-2023-26428?
- CVE-2023-26428 is a medium-severity vulnerability in Open-Xchange Appsuite Backend, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 6.5/10. Published 2023-06-20.
- How severe is CVE-2023-26428?
- Medium severity. CVSS v3 base score is 6.5 out of 10.