LibreNMS up to 25.7.x Alert Template cross site scripting

CVSS Meta Temp Score
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CTI Interest Score
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4.4$0-$5k0.00

Summaryinfo

A vulnerability was found in LibreNMS up to 25.7.x. It has been classified as problematic. Impacted is an unknown function of the component Alert Template Handler. This manipulation causes cross site scripting. The identification of this vulnerability is CVE-2025-55296. It is possible to initiate the attack remotely. There is no exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in LibreNMS up to 25.7.x. It has been declared as problematic. Affected by this vulnerability is an unknown code block of the component Alert Template Handler. The manipulation with an unknown input leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. As an impact it is known to affect integrity. The summary by CVE is:

librenms is a community-based GPL-licensed network monitoring system. A stored Cross-Site Scripting (XSS) vulnerability exists in LibreNMS (<= 25.6.0) in the Alert Template creation feature. This allows a user with the admin role to inject malicious JavaScript, which will be executed when the template is rendered, potentially compromising other admin accounts. This vulnerability is fixed in 25.8.0.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2025-55296 since 08/12/2025. The exploitation appears to be easy. The attack can be launched remotely. Additional levels of successful authentication are needed for exploitation. 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 T1059.007 according to MITRE ATT&CK.

Upgrading to version 25.8.0 eliminates this vulnerability. Applying the patch 8ade3d827d317f5ac4b336617aafff865f825958 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.4
VulDB Meta Temp Score: 4.4

VulDB Base Score: 2.4
VulDB Temp Score: 2.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 5.4
NVD Vector: 🔒

CNA Base Score: 5.5
CNA Vector (GitHub_M): 🔒

CVSSv2info

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

Exploitinginfo

Class: Cross site scripting
CWE: CWE-79 / CWE-94 / CWE-74
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: 🔒

Upgrade: LibreNMS 25.8.0
Patch: 8ade3d827d317f5ac4b336617aafff865f825958

Timelineinfo

08/12/2025 CVE reserved
08/18/2025 +6 days Advisory disclosed
08/18/2025 +0 days VulDB entry created
09/10/2025 +23 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: GHSA-vxq6-8cwm-wj99
Status: Confirmed

CVE: CVE-2025-55296 (🔒)
GCVE (CVE): GCVE-0-2025-55296
GCVE (VulDB): GCVE-100-320479

Entryinfo

Created: 08/18/2025 21:26
Updated: 09/10/2025 16:48
Changes: 08/18/2025 21:26 (66), 09/10/2025 16:48 (12)
Complete: 🔍
Cache ID: 216::103

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