mermaid-js mermaid up to 11.9.x html cross site scripting

CVSS Meta Temp Score
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CTI Interest Score
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5.2$0-$5k0.00

Summaryinfo

A vulnerability identified as problematic has been detected in mermaid-js mermaid up to 11.9.x. This affects the function html. This manipulation causes cross site scripting. This vulnerability is handled as CVE-2025-54880. The attack can be initiated remotely. There is not any exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic was found in mermaid-js mermaid up to 11.9.x. Affected by this vulnerability is the function html. 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 confidentiality, and integrity. The summary by CVE is:

Mermaid is a JavaScript based diagramming and charting tool that uses Markdown-inspired text definitions and a renderer to create and modify complex diagrams. In the default configuration of mermaid 11.9.0 and earlier, user supplied input for architecture diagram icons is passed to the d3 html() method, creating a sink for cross site scripting. This vulnerability is fixed in 11.10.0.

The advisory is shared at github.com. This vulnerability is known as CVE-2025-54880 since 07/31/2025. The exploitation appears to be easy. The attack can be launched remotely. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 264684 (Fedora 41 : jupyterlab (2025-bdd1059817)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 11.10.0 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (264684). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

Name

Version

Website

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: 5.2

VulDB Base Score: 4.6
VulDB Temp Score: 4.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 6.1
NVD Vector: 🔒

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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Nessus ID: 264684
Nessus Name: Fedora 41 : jupyterlab (2025-bdd1059817)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: mermaid 11.10.0

Timelineinfo

07/31/2025 CVE reserved
08/19/2025 +19 days Advisory disclosed
08/19/2025 +0 days VulDB entry created
10/20/2025 +62 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: github.com
Status: Confirmed

CVE: CVE-2025-54880 (🔒)
GCVE (CVE): GCVE-0-2025-54880
GCVE (VulDB): GCVE-100-320581

Entryinfo

Created: 08/19/2025 19:22
Updated: 10/20/2025 17:31
Changes: 08/19/2025 19:22 (67), 09/13/2025 16:18 (2), 10/20/2025 17:31 (12)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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