What is CVE-2022-39255?

CVE-2022-39255 is a high-severity vulnerability in Matrix-org Matrix-ios-sdk, classified under Key Exchange without Entity Authentication. CVSS score: 8.6/10. Published 2022-09-28.

How severe is CVE-2022-39255?

High severity. CVSS v3 base score is 8.6 out of 10.

Auth bypass in Matrix-org Matrix-ios-sdk

CVE-2022-39255

Matrix iOS SDK allows developers to build iOS apps compatible with Matrix. Prior to version 0.23.19, an attacker cooperating with a malicious homeserver can construct messages that legitimately appear to have come from another person, with…

EPSS: 0.002 (48.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N.

Affected products

Matrix-org Matrix-ios-sdk — versions < 0.23.19

Weakness classification (CWE)

References

matrix.org/blog/2022/09/28/upgrade-now-to-address-encryption-vulns-in-matrix-sd… (x_refsource_MISC)
github.com/matrix-org/matrix-ios-sdk/security/advisories/GHSA-hw6g-j8v6-9hcm (x_refsource_CONFIRM)
github.com/matrix-org/matrix-ios-sdk/commit/5ca86c328a5faaab429c240551cb9ca8f0f… (x_refsource_MISC)
github.com/matrix-org/matrix-ios-sdk/releases/tag/v0.23.19 (x_refsource_MISC)

Frequently asked questions

What is CVE-2022-39255?: CVE-2022-39255 is a high-severity vulnerability in Matrix-org Matrix-ios-sdk, classified under Key Exchange without Entity Authentication. CVSS score: 8.6/10. Published 2022-09-28.
How severe is CVE-2022-39255?: High severity. CVSS v3 base score is 8.6 out of 10.