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CVE-2025-31127— Element X Android allows the entity in control of the well-known file to break the confidentiality embedded Element Call

Quick assessment

Affected
element-hq element-x-android
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Element X Android是Element开源的一个使用 Matrix Rust Sdk 和 Jetpack Compose 的 Android Matrix 应用程序。 Element X Android 0.4.16版本至25.03.3版本存在信息泄露漏洞，该漏洞源于element.json文件可能导致媒体加密密钥泄露。

CVSS 5.3 · Medium EPSS 0.19% · P8

Possible ATT&CK Techniques 1 AI

T1078.001 · Default Accounts
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I. Basic Information for CVE-2025-31127

Vulnerability Information
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Vulnerability Title
Element X Android allows the entity in control of the well-known file to break the confidentiality embedded Element Call
Source: CVE Program / CVE List V5
Vulnerability Description
Element X Android is a Matrix Android Client provided by element.io. In Element X Android versions between 0.4.16 and 25.03.3, the entity in control of the element.json well-known file is able, under certain conditions, to get access to the media encryption keys used for an Element Call call. This vulnerability is fixed in 25.03.4.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
Element X Android 信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Element X Android是Element开源的一个使用 Matrix Rust Sdk 和 Jetpack Compose 的 Android Matrix 应用程序。 Element X Android 0.4.16版本至25.03.3版本存在信息泄露漏洞，该漏洞源于element.json文件可能导致媒体加密密钥泄露。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
element-hq element-x-android >= 0.4.16, < 25.03.4 -

II. Public POCs for CVE-2025-31127

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III. Intelligence Information for CVE-2025-31127

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IV. Related Vulnerabilities

Same product: element-x-android
Same vendor: element-hq
Same weakness: CWE-200

V. Comments for CVE-2025-31127

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