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CVE-2023-26430

3.5 · LOW

Attackers with access to user accounts can inject arbitrary control characters to SIEVE mail-filter rules.

Published Aug 2, 2023CWE-77EPSS 0.75%

Overview

CVE-2023-26430 is a low-severity vulnerability. It was published on August 2, 2023 and has a CVSS 3.1 base score of 3.5 (LOW).

This vulnerability has a CVSS 3.1 base score of 3.5, rated LOW. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

Attackers with access to user accounts can inject arbitrary control characters to SIEVE mail-filter rules. This could be abused to access SIEVE extension that are not allowed by App Suite or to inject rules which would break per-user filter processing, requiring manual cleanup of such rules. We have added sanitization to all mail-filter APIs to avoid forwardning control characters to subsystems. No publicly available exploits are known.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refpacketstormsecurity.com/files/173943/OX-App-Suite-SSRF-SQL-Injection-Cross-Site-Scripting.htmlRefseclists.org/fulldisclosure/2023/Aug/8Refdocumentation.open-xchange.com/appsuite/security/advisories/csaf/2023/oxas-adv-2023-0003.jsonRefsoftware.open-xchange.com/products/appsuite/doc/Release_Notes_for_Patch_Release_6230_7.10.6_2023-05-02.pdfRefpacketstormsecurity.com/files/173943/OX-App-Suite-SSRF-SQL-Injection-Cross-Site-Scripting.htmlRefseclists.org/fulldisclosure/2023/Aug/8Refdocumentation.open-xchange.com/appsuite/security/advisories/csaf/2023/oxas-adv-2023-0003.jsonRefsoftware.open-xchange.com/products/appsuite/doc/Release_Notes_for_Patch_Release_6230_7.10.6_2023-05-02.pdf

How CyberStrike helps

Frequently asked questions

What is CVE-2023-26430?

CVE-2023-26430 is a low-severity vulnerability. It was published on August 2, 2023 and has a CVSS 3.1 base score of 3.5 (LOW).

How severe is CVE-2023-26430?

This vulnerability has a CVSS 3.1 base score of 3.5, rated LOW. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2023-26430?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2023-26430?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2023-26430 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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