CVE-2023-26430 json
Attackers with access to user accounts can inject arbitrary control characters to SIEVE mail-filter rules.
published 2023-08-02 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-30250
- cvss
- 3.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.8%
- EPSS 0.8% chance of exploitation in 30 days, percentile 55%
- public exploits
- 0
- none known
Summary
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.
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 2 y ago
Exploit prediction
0.75% chance of exploitation in the next 30 days, higher than 55% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 3.5 | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:N |
| NVD | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N |
Affected products
- OX Software GmbH OX App Suite
Classification
- Weakness
-
- CWE-77 Improper Neutralization of Special Elements used in a Command
References
-
documentation.open-xchange.com
/appsuite/security/advisories/csaf/2023/oxas-adv-2023-0003.json
vendor-advisory
-
software.open-xchange.com
/products/appsuite/doc/Release_Notes_for_Patch_Release_6230_7.10.6_2023-05-02.pdf
release-notes
-
seclists.org
/fulldisclosure/2023/Aug/8
mailing-list, third-party-advisory
-
packetstormsecurity.com
/files/173943/OX-App-Suite-SSRF-SQL-Injection-Cross-Site-Scripting.html
third-party-advisory, vdb-entry
Sources
- CVE List CVE-2023-26430
- NVD CVE-2023-26430
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.