What is CVE-2018-16515?

CVE-2018-16515 is a high-severity vulnerability in Matrix Synapse, classified under Improper Verification of Cryptographic Signature. CVSS score: 8.8/10. Published 2018-09-18.

How severe is CVE-2018-16515?

High severity. CVSS v3 base score is 8.8 out of 10.

Vulnerability in Matrix Synapse

CVE-2018-16515

Matrix Synapse before 0.33.3.1 allows remote attackers to spoof events and possibly have unspecified other impacts by leveraging improper transaction and event signature validation.

EPSS: 0.015 (71.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Matrix Synapse
Debian Debian_linux — versions 8.0
N/a — versions n/a

Weakness classification (CWE)

CWE-347 — Improper Verification of Cryptographic Signature

References

cve@mitre.org (x_refsource_CONFIRM, Patch, Third Party Advisory)
cve@mitre.org (vendor-advisory, x_refsource_FEDORA)
cve@mitre.org (x_refsource_CONFIRM, Vendor Advisory)

Frequently asked questions

What is CVE-2018-16515?: CVE-2018-16515 is a high-severity vulnerability in Matrix Synapse, classified under Improper Verification of Cryptographic Signature. CVSS score: 8.8/10. Published 2018-09-18.
How severe is CVE-2018-16515?: High severity. CVSS v3 base score is 8.8 out of 10.