What is CVE-2023-26442?

CVE-2023-26442 is a low-severity vulnerability in Open-Xchange Appsuite Office, classified under Server-Side Request Forgery (SSRF). CVSS score: 3.2/10. Published 2023-08-02.

How severe is CVE-2023-26442?

Low severity. CVSS v3 base score is 3.2 out of 10.

Is CVE-2023-26442 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

SSRF in Open-Xchange Appsuite Office

CVE-2023-26442

In case Cacheservice was configured to use a sproxyd object-storage backend, it would follow HTTP redirects issued by that backend. An attacker with access to a local or restricted network with the capability to intercept and replay HTTP requests to sproxyd (or who is in control of the sproxyd service) could perform a server-side request-forgery attack and make Cacheservice connect to unexpected resources. We have disabled the ability to follow HTTP redirects when connecting to sproxyd resources. No publicly available exploits are known.

Vulnerability class: SSRF (Server-Side Request Forgery)

Published 2023-08-02 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 3.2 (Low). Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.004 (26.9th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 27th percentile — 26.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Open-Xchange Appsuite Office
Ox Software Gmbh App Suite — versions 0

Weakness classification (CWE)

CWE-918 — Server-Side Request Forgery (SSRF)

Public proof-of-concept exploits

fkie-cad/nvd-json-data-feeds

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/Aug/8 (Mailing List, Third Party Advisory)
packetstormsecurity.com/files/173943/OX-App-Suite-SSRF-SQL-Injection-Cross-Site… (VDB Entry, Third Party Advisory)

Frequently asked questions

What is CVE-2023-26442?: CVE-2023-26442 is a low-severity vulnerability in Open-Xchange Appsuite Office, classified under Server-Side Request Forgery (SSRF). CVSS score: 3.2/10. Published 2023-08-02.
How severe is CVE-2023-26442?: Low severity. CVSS v3 base score is 3.2 out of 10.
Is CVE-2023-26442 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.