SSRF in Open-Xchange Appsuite Backend
CVE-2023-26435
It was possible to call filesystem and network references using the local LibreOffice instance using manipulated ODT documents. Attackers could discover restricted network topology and services as well as including local files with read permissions of the open-xchange system user. This was limited to specific file-types, like images. We have improved existing content filters and validators to avoid including any local resources. No publicly available exploits are known.
Vulnerability class: SSRF (Server-Side Request Forgery)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.0 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.008 (54.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 54th percentile — 54.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · 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-2023-26435?
- CVE-2023-26435 is a medium-severity vulnerability in Open-Xchange Appsuite Backend, classified under Server-Side Request Forgery (SSRF). CVSS score: 5.0/10. Published 2023-06-20.
- How severe is CVE-2023-26435?
- Medium severity. CVSS v3 base score is 5.0 out of 10.