Attackers with access to the "documentconverterws" API were able to inject serialized Java objects, that were not properly checked during deserialization. Access to this API endpoint is restricted to local networks by default. Arbitrary code could be injected that is being executed when processing the request. A check has been introduced to restrict processing of legal and expected classes for this API. We now log a warning in case there are attempts to inject illegal classes. No publicly available exploits are known.
Published 2023-06-20 08:15:10
Updated 2024-01-12 08:15:41
Source Open-Xchange
View at NVD,   CVE.org

Exploit prediction scoring system (EPSS) score for CVE-2023-26436

0.06%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 22 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2023-26436

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
8.8
HIGH CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
2.8
5.9
NIST
7.1
HIGH CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
0.5
6.0
Open-Xchange

CWE ids for CVE-2023-26436

  • The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.
    Assigned by: security@open-xchange.com (Secondary)
  • The product deserializes untrusted data without sufficiently verifying that the resulting data will be valid.
    Assigned by: nvd@nist.gov (Primary)

Products affected by CVE-2023-26436

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