VDB-346703 · CVE-2025-15581 · Nessus 299598

orthanc-server orthanc up to 1.12.9 improper authentication

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.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.8	$0-$5k	0.00

Summaryinfo

A vulnerability was found in orthanc-server orthanc up to 1.12.9. It has been rated as critical. Impacted is an unknown function. The manipulation leads to improper authentication. This vulnerability is listed as CVE-2025-15581. The attack may be initiated remotely. In addition, an exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in orthanc-server orthanc up to 1.12.9 and classified as critical. This issue affects an unknown function. The manipulation with an unknown input leads to a improper authentication vulnerability. Using CWE to declare the problem leads to CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Orthanc versions before 1.12.10 are affected by an authorisation logic flaw in the application's HTTP Basic Authentication implementation. Successful exploitation could result in Privilege Escalation, potentially allowing full administrative access.

It is possible to read the advisory at projectblack.io. The identification of this vulnerability is CVE-2025-15581 since 02/18/2026. The exploitation is known to be easy. The attack may be initiated remotely. Technical details are unknown but a public exploit is available.

The exploit is available at projectblack.io. It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 299598 (Linux Distros Unpatched Vulnerability : CVE-2025-15581), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 1.12.10 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (299598). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

orthanc-server

Name

orthanc

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: 7.6
VulDB Meta Temp Score: 6.8

VulDB Base Score: 7.6
VulDB Temp Score: 6.8
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

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

Exploitinginfo

Class: Improper authentication
CWE: CWE-287
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 299598
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2025-15581

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: orthanc 1.12.10

Timelineinfo

02/18/2026 CVE reserved
02/19/2026 +1 days Advisory disclosed
02/19/2026 +0 days VulDB entry created
02/28/2026 +9 days VulDB entry last update

Sourcesinfo

Advisory: projectblack.io
Status: Confirmed

CVE: CVE-2025-15581 (🔒)
GCVE (CVE): GCVE-0-2025-15581
GCVE (VulDB): GCVE-100-346703
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 02/19/2026 08:20
Updated: 02/28/2026 20:26
Changes: 02/19/2026 08:20 (69), 02/19/2026 22:08 (2), 02/28/2026 20:26 (2)
Complete: 🔍
Cache ID: 216::103