8.6

CVE-2022-39252: matrix-org matrix-rust-sdk Improper Authentication

CVSS: 8.6v3.1HighModified
AliasesGHSA-vp68-2wrm-69qmRUSTSEC-2022-0085
Published 29-09-2022Last modified 23-04-2025
Open JSON

Vulnerability summary

CVE-2022-39252 is a high (CVSS 8.6) Improper Authentication vulnerability in matrix-org matrix-rust-sdk. EPSS estimates a 0.63% chance of exploitation in the next 30 days, higher than 49.2% of scored vulnerabilities.

Overall risk
35/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.6/10
010
High · v3.1 (CVE.org)
EPSS score
0.63%
0%100%
Low · +0.11 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 29-09-2022
    PublishedVulnerability first disclosed.
  2. 23-04-2025
    Last modifiedVulnerability information updated.

Description

matrix-rust-sdk is an implementation of a Matrix client-server library in Rust, and matrix-sdk-crypto is the Matrix encryption library. Prior to version 0.6, when a user requests a room key from their devices, the software correctly remembers the request. When the user receives a forwarded room key, the software accepts it without checking who the room key came from. This allows homeservers to try to insert room keys of questionable validity, potentially mounting an impersonation attack. Version 0.6 fixes this issue.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.63%

Chance of exploitation in the next 30 days

Percentile

49%

Versus all other CVEs

30-day change

+0.11 pp

From 0.52% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.63%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Crates.Io1 product
  • matrix-sdk-crypto< 0.6.0 | ≥ 0.0.0-0, < 0.6.0
Matrix1 product
Matrix-org1 product

3 vendors · 3 products

References

8 links