EGroupware up to 23.1.20260131/26.2.20260216 Self-Registration improper authorization

CVSS Meta Temp Score
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CTI Interest Score
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5.3$0-$5k1.21-

Summaryinfo

A vulnerability, which was classified as critical, was found in EGroupware up to 23.1.20260131/26.2.20260216. Affected by this issue is some unknown functionality of the component Self-Registration. The manipulation results in improper authorization. This vulnerability is cataloged as CVE-2026-27823. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in EGroupware up to 23.1.20260131/26.2.20260216. It has been classified as critical. Affected is some unknown functionality of the component Self-Registration. The manipulation with an unknown input leads to a improper authorization vulnerability. CWE is classifying the issue as CWE-285. The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

A vulnerability has been identified in EGroupware that may lead to Remote Code Execution (RCE). The issue allows an authenticated attacker to execute arbitrary commands on the server. If user self-registration is enabled, the vulnerability may be exploitable without prior authentication. The vulnerability stems from improper authorization checks combined with a file write primitive and an arbitrary file read vulnerability, which together enable full system compromise. This has been patched in versions 26.2.20260224 and 23.1.20260224.

The advisory is available at github.com. This vulnerability is traded as CVE-2026-27823 since 02/24/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. Successful exploitation requires user interaction by the victim. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1548.002 by the MITRE ATT&CK project.

Upgrading to version 23.1.20260224 or 26.2.20260224 eliminates this vulnerability.

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

Productinfo

Type

Name

Version

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.3

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
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: Improper authorization
CWE: 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: no mitigation known
Status: 🔍

0-Day Time: 🔒

Upgrade: EGroupware 23.1.20260224/26.2.20260224

Timelineinfo

02/24/2026 CVE reserved
07/20/2026 +145 days Advisory disclosed
07/20/2026 +0 days VulDB entry created
07/20/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: github.com
Status: Confirmed

CVE: CVE-2026-27823 (🔒)
GCVE (CVE): GCVE-0-2026-27823
GCVE (VulDB): GCVE-100-380634

Entryinfo

Created: 07/20/2026 18:16
Changes: 07/20/2026 18:16 (53)
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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