🛡️ CVE-2025-27155 — pinecone

🟡 CVSS 6.1 — Medium ✅ No Known Exploit CWE-79 NVD
6.1
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

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

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](mailto:[email protected]).

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. A user must be tricked into taking some action. The scope is changed, meaning a successful attack can affect components beyond the vulnerable one. Rated impact: confidentiality low, integrity low, availability none.

Weakness class

CVE-2025-27155 is classified as CWE-79: Cross-site Scripting (XSS). User-supplied data is written into a page without escaping, so attacker script runs in the browser of anyone who views it.

Affected software

CVE-2025-27155 is recorded against 2 packages.

  • github.com/matrix-org/pinecone
  • unknown

Timeline and source

Published on 4 March 2025 and last revised on 3 March 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.

References

github.com (Web)
nvd.nist.gov (Advisory)
github.com (Web)
github.com (Package)
pkg.go.dev (Web)

Details

Severity Medium
CVSS Score 6.1
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CWE CWE-79
Public Exploit ✅ No
Source NVD
Published 2025-03-04
Updated 2026-08-12
Modified 2026-03-03

Affected Packages

Software From version Fixed in
github.com/matrix-org/pinecone — —
unknown — —

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