SSRF in Open-xchange Open-xchange_appsuite_backend
CVE-2023-26438
External service lookups for a number of protocols were vulnerable to a time-of-check/time-of-use (TOCTOU) weakness, involving the JDK DNS cache. Attackers that were timing DNS cache expiry correctly were able to inject configuration that…
Vulnerability class: SSRF (Server-Side Request Forgery)
EPSS: 0.005 (39.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.
Affected products
- Open-xchange Open-xchange_appsuite_backend — versions 7.10.6, 8.10.0
- Ox Software Gmbh App Suite — versions 0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security@open-xchange.com (release-notes, Release Notes)
- security@open-xchange.com (vendor-advisory)
- security@open-xchange.com (Mailing List, Third Party Advisory)
- security@open-xchange.com (VDB Entry, Third Party Advisory)
Frequently asked questions
- What is CVE-2023-26438?
- CVE-2023-26438 is a medium-severity vulnerability in Open-xchange Open-xchange_appsuite_backend, classified under Server-Side Request Forgery (SSRF). CVSS score: 4.3/10. Published 2023-08-02.
- How severe is CVE-2023-26438?
- Medium severity. CVSS v3 base score is 4.3 out of 10.
- Is CVE-2023-26438 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.