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Medium, CVSS 6.1

In-memory stored Cross-site scripting (XSS) vulnerability in pineconesim

CVE-2025-27155GHSA-fr62-mg2q-7wqv

What to do

Vendor response not established. Follow the primary source's mitigation guidance and check back for a fix.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

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Affected packages

  • Go github.com/matrix-org/pinecone

    Affected
    <= 0.11.0
    Fixed in
    no fixed version recorded

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS
6.1 · CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
EPSS
  • CVE-2025-27155: 0.24% estimated exploitation activity in the next 30 days; percentile 14.52 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.
Source description

As published by the source; long descriptions are shortened.

Impact The Pinecone Simulator (pineconesim) included in Pinecone up to commit https://github.com/matrix-org/pinecone/commit/ea4c33717fd74ef7d6f49490625a0fa10e3f5bbc is vulnerable to stored cross-site scripting. The payload storage is not permanent and will be wiped when restarting pineconsim. Patches Commit https://github.com/matrix-org/pinecone/commit/218b2801995b174085cb1c8fafe2d3aa661f85bd contains the fixes. Workarounds N/A For more information If you have any questions or comments about this advisory, please email us at security at matrix.org.

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 1 · created ·

    Published from ghsa record GHSA-fr62-mg2q-7wqv

Agent brief

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# Patch Next advisory brief: CVE-2025-27155

Advisory: In-memory stored Cross-site scripting (XSS) vulnerability in pineconesim
IDs: CVE-2025-27155, GHSA-fr62-mg2q-7wqv
Record: https://patchnext.com/advisories/cve-2025-27155 (revision 1, source checked 26 Oct 2026, 15:09 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 6.1)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor response not established. A vendor fix does not mean a deployment is fixed.

## Affected components
- Go github.com/matrix-org/pinecone: affected <= 0.11.0

## Suggested inspection (read-only)
- Go github.com/matrix-org/pinecone: check the installed version with your package manager.

## Supported action
No complete vendor fix is recorded. Follow the primary source's mitigation guidance and check this record again before closing anything.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on github.com/matrix-org/pinecone.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-fr62-mg2q-7wqv (GitHub-reviewed advisory GHSA-fr62-mg2q-7wqv lists affected ranges: Go github.com/matrix-org/pinecone >=0 <=0.11.0)

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