CVE-2025-27155Network attack vector

Browser script execution via unsanitized simulator data

Published Mar 4, 2025 · Updated Mar 4, 2025

Stored XSS in Matrix.org Pinecone through ea4c337 allows remote attackers to run script in a viewer's browser via simulator data. Pineconesim graph.js concatenates node and network fields into innerHTML for hover, node, and statistics panels without sanitizing them. Exploitation requires a viewer to load the affected simulator UI; the payload remains only in memory and is cleared when pineconesim restarts.

CVSS severity6.1
Medium
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Matrix.org Pinecone through ea4c337 allows remote attackers to run script in a viewer's browser via simulator data. Pineconesim graph.js concatenates node and network fields into innerHTML for hover, node, and statistics panels without sanitizing them. Exploitation requires a viewer to load the affected simulator UI; the payload remains only in memory and is cleared when pineconesim restarts.

The record

CVE
CVE-2025-27155
Published
Mar 4, 2025
Updated
Mar 4, 2025
Vendor
Matrix.org
Product
Pinecone
Classifications
CWE-80, CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 4, 2025CVE publishedPublication date reported by the CVE source.
  2. Mar 4, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 218b2801995b174085cb1c8fafe2d3aa661f85bd

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Matrix.org · Pineconeversion=< 218b2801995b174085cb1c8fafe2d3aa661f85bd

Published CVSS scores

6.1GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-80Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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