5

CVE-2023-26435: open-xchange open-xchange_appsuite_backend Server-Side Request Forgery (SSRF)

CVSS: 5.0v3.1MediumModified
Published 20-06-2023Last modified 02-08-2024
Open JSON

Vulnerability summary

CVE-2023-26435 is a medium (CVSS 5.0) Server-Side Request Forgery (SSRF) vulnerability in open-xchange open-xchange_appsuite_backend. EPSS estimates a 0.78% chance of exploitation in the next 30 days, higher than 55.4% of scored vulnerabilities.

Overall risk
20/100
0100
Low · default modelHow is this calculated?
CVSS score
5.0/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.78%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 20-06-2023
    PublishedVulnerability first disclosed.
  2. 02-08-2024
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.78%

Chance of exploitation in the next 30 days

Percentile

55%

Versus all other CVEs

30-day change

0.00 pp

From 0.78% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.78%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Open-xchange1 product
Ox software gmbh1 product

2 vendors · 2 products

References

4 links