Checkmk up to 2.5.0p4 authorization

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.1$0-$5k2.68-

Summaryinfo

A vulnerability was found in Checkmk up to 2.5.0p4 and classified as problematic. This affects an unknown part. Executing a manipulation can lead to authorization. The identification of this vulnerability is CVE-2026-7765. The attack may be launched remotely. There is no exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Checkmk up to 2.5.0p4 and classified as problematic. This vulnerability affects an unknown code. The manipulation with an unknown input leads to a authorization vulnerability. The CWE definition for the vulnerability is CWE-863. The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. This allows attackers to bypass intended access restrictions. As an impact it is known to affect confidentiality. CVE summarizes:

Incorrect authorization in the User Messages dashboard widget in Checkmk <2.5.0p5 causes the message-fetching endpoints to return the dashboard creator's messages rather than the viewer's, allowing an attacker who knows a valid public dashboard share token to read the issuer's personal messages by sending requests to the underlying endpoint, even without a User Messages widget present.

The advisory is shared for download at checkmk.com. This vulnerability was named CVE-2026-7765 since 05/04/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available.

Upgrading to version 2.5.0p5 eliminates this vulnerability.

The vulnerability is also documented in the databases at EUVD (EUVD-2026-35051) and CERT Bund (WID-SEC-2026-1817). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Affected

  • Checkmk Checkmk

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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

Exploitinginfo

Class: Authorization
CWE: CWE-863 / CWE-285 / CWE-266
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Checkmk 2.5.0p5

Timelineinfo

05/04/2026 CVE reserved
06/08/2026 +35 days Advisory disclosed
06/08/2026 +0 days VulDB entry created
06/09/2026 +1 days VulDB entry last update

Sourcesinfo

Advisory: checkmk.com
Status: Confirmed

CVE: CVE-2026-7765 (🔒)
GCVE (CVE): GCVE-0-2026-7765
GCVE (VulDB): GCVE-100-369184
EUVD: 🔒
CERT Bund: WID-SEC-2026-1817 - Checkmk: Mehrere Schwachstellen erm&ouml;glichen Cross-Site Scripting

Entryinfo

Created: 06/08/2026 15:17
Updated: 06/09/2026 11:55
Changes: 06/08/2026 15:17 (64), 06/08/2026 17:31 (1), 06/09/2026 11:55 (7)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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