OTRS Community Edition up to 2026.3.x Customer Backend information disclosure

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
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CTI Interest Score
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4.5$0-$5k0.00

Summaryinfo

A vulnerability was found in OTRS Community Edition up to 2026.3.x. It has been classified as problematic. Impacted is an unknown function of the component Customer Backend Module. This manipulation causes information disclosure. This vulnerability appears as CVE-2026-48189. The attack may be initiated remotely. There is no available exploit. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in OTRS Community Edition up to 2026.3.x. It has been declared as problematic. Affected by this vulnerability is an unknown code block of the component Customer Backend Module. The manipulation with an unknown input leads to a information disclosure vulnerability. The CWE definition for the vulnerability is CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. As an impact it is known to affect confidentiality. The summary by CVE is:

An improper Input Validation vulnerability in OTRS Customer Backend module allows to access customer information which are restricted to other groups. Please note that the feature has to be anabled and CustomerGroupSupport has to be used to be affected. This issue affects OTRS: * 7.0.X * 8.0.X * 2023.X * 2024.X * 2025.X * 2026.X before 2026.4.X

It is possible to read the advisory at otrs.com. This vulnerability is known as CVE-2026-48189 since 05/21/2026. The exploitation appears to be easy. The attack can be launched remotely. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1592 according to MITRE ATT&CK.

Upgrading eliminates this vulnerability.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.6
VulDB Meta Temp Score: 4.5

VulDB Base Score: 3.5
VulDB Temp Score: 3.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 5.7
CNA Vector (OTRS): 🔒

CVSSv2info

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

Exploitinginfo

Class: Information disclosure
CWE: CWE-200 / CWE-284 / CWE-266
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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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Timelineinfo

05/21/2026 CVE reserved
06/01/2026 +11 days Advisory disclosed
06/01/2026 +0 days VulDB entry created
06/01/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: otrs.com
Status: Confirmed

CVE: CVE-2026-48189 (🔒)
GCVE (CVE): GCVE-0-2026-48189
GCVE (VulDB): GCVE-100-367603

Entryinfo

Created: 06/01/2026 07:58
Changes: 06/01/2026 07:58 (64)
Complete: 🔍
Cache ID: 216::103

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