Open-Xchange OX Dovecot Pro up to 2.4.3/3.1.4 parameter pollution

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.3$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic was found in Open-Xchange OX Dovecot Pro up to 2.4.3/3.1.4. Affected by this issue is some unknown functionality. Executing a manipulation can lead to parameter pollution. The identification of this vulnerability is CVE-2026-27851. The attack may be launched remotely. There is no exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as problematic was found in Open-Xchange OX Dovecot Pro up to 2.4.3/3.1.4. This vulnerability affects an unknown function. The manipulation with an unknown input leads to a parameter pollution vulnerability. The CWE definition for the vulnerability is CWE-235. The product does not handle or incorrectly handles when the number of parameters, fields, or arguments with the same name exceeds the expected amount. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

When safe filter is used with variable expansion, all following pipelines on the same string are incorrectly interpreted as safe too, enabling unsafe data to be unescaped. This can enable SQL / LDAP injection attacks when used in authentication. Avoid using safe filter until on fixed version. No publicly available exploits are known.

The advisory is available at documentation.open-xchange.com. This vulnerability was named CVE-2026-27851 since 02/24/2026. The exploitation appears to be difficult. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. The technical details are unknown and an exploit is not available.

The vulnerability scanner Nessus provides a plugin with the ID 323080 (SUSE SLES16: dovecot24 / dovecot24-backend-mysql / dovecot24-backend-pgsql / etc (SUSE-SU-2026:22185-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (323080) and EUVD (EUVD-2026-29467). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

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Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.4
VulDB Meta Temp Score: 7.3

VulDB Base Score: 5.6
VulDB Temp Score: 5.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 9.1
NVD Vector: 🔒

CNA Base Score: 7.4
CNA Vector: 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Parameter pollution
CWE: CWE-235 / CWE-233 / CWE-229
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 323080
Nessus Name: SUSE SLES16: dovecot24 / dovecot24-backend-mysql / dovecot24-backend-pgsql / etc (SUSE-SU-2026:22185-1)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Timelineinfo

02/24/2026 CVE reserved
05/12/2026 +76 days Advisory disclosed
05/12/2026 +0 days VulDB entry created
06/27/2026 +46 days VulDB entry last update

Sourcesinfo

Vendor: open-xchange.com

Advisory: adv-2026-0002
Status: Confirmed

CVE: CVE-2026-27851 (🔒)
GCVE (CVE): GCVE-0-2026-27851
GCVE (VulDB): GCVE-100-363034
EUVD: 🔒

Entryinfo

Created: 05/12/2026 17:00
Updated: 06/27/2026 21:29
Changes: 05/12/2026 17:00 (62), 05/12/2026 17:59 (1), 05/19/2026 02:57 (11), 06/27/2026 21:29 (2)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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