CVE-2025-27155: matrix-org pinecone Cross-site Scripting
Vulnerability summary
CVE-2025-27155 is a medium (CVSS 6.1) Cross-site Scripting vulnerability in matrix-org pinecone. EPSS estimates a 0.24% chance of exploitation in the next 30 days, higher than 13.4% of scored vulnerabilities.
Advisory lineage
Upstream 0 · Downstream 1 · Related 1Timeline
- 04-03-2025PublishedVulnerability first disclosed.
- 04-03-2025Last modifiedVulnerability information updated.
Description
Pinecone is an experimental overlay routing protocol suite which is the foundation of the current P2P Matrix demos. The Pinecone Simulator (pineconesim) included in Pinecone up to commit ea4c337 is vulnerable to stored cross-site scripting. The payload storage is not permanent and will be wiped when restarting pineconesim.
CVSS metrics
3 scores · 3 sources · 1 version- OSV · GoEcosystem advisory · calculated6.1MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- NVDNIST6.1MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
EPSS trend
Probability
0.24%
Chance of exploitation in the next 30 days
Percentile
13%
Versus all other CVEs
30-day change
+0.01 pp
From 0.23% on 18-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')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.
- CWE-80Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)The product receives input from an upstream component, but it does not neutralize or incorrectly neutralizes special characters such as "<", ">", and "&" that could be interpreted as web-scripting elements when they are sent to a downstream component that processes web pages.
Affected systems
Github.com/matrix-org1 product
- pinecone≤ 0.11.0 | All versions (No fix recorded)
Matrix-org1 product
- pinecone< 218b2801995b174085cb1c8fafe2d3aa661f85bd
2 vendors · 2 products
References
5 links- github.com/matrix-org/pinecone/security/advisories/GHSA-fr62-mg2q-7wqvX Refsource CONFIRMWEBAdvisory
- github.com/matrix-org/pinecone/commit/218b2801995b174085cb1c8fafe2d3aa661f85bdX Refsource MISCWEBFIX