What is CVE-2023-28103?

CVE-2023-28103 is a high-severity vulnerability in Matrix-Org Matrix-React-Sdk, classified under Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution). CVSS score: 8.2/10. Published 2023-03-28.

How severe is CVE-2023-28103?

High severity. CVSS v3 base score is 8.2 out of 10.

Prototype Pollution in Matrix-Org Matrix-React-Sdk

CVE-2023-28103

matrix-react-sdk is a Matrix chat protocol SDK for React Javascript. In certain configurations, data sent by remote servers containing special strings in key locations could cause modifications of the `Object.prototype`, disrupting matrix-react-sdk functionality, causing denial of service and potentially affecting program logic. This is fixed in matrix-react-sdk 3.69.0 and users are advised to upgrade. There are no known workarounds for this vulnerability. Note this advisory is distinct from GHSA-2x9c-qwgf-94xr which refers to a similar issue.

Vulnerability class: Prototype Pollution

EPSS: 0.007 (49.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H.

Affected products

Matrix-org Matrix-react-sdk — versions < 3.69.0
Matrix-react-sdk_project Matrix-react-sdk

Weakness classification (CWE)

CWE-1321 — Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution)

References

security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)
security-advisories@github.com (x_refsource_MISC, Vendor Advisory)

Frequently asked questions

What is CVE-2023-28103?: CVE-2023-28103 is a high-severity vulnerability in Matrix-Org Matrix-React-Sdk, classified under Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution). CVSS score: 8.2/10. Published 2023-03-28.
How severe is CVE-2023-28103?: High severity. CVSS v3 base score is 8.2 out of 10.