CVE-2025-31126Network attack vector

Call-key disclosure via attacker-controlled widget origin

Published Apr 3, 2025 · Updated Apr 7, 2025

Information disclosure in Element X iOS 1.6.13 through 25.03.7 allows remote attackers to obtain Element Call media encryption keys. The client accepts a widget_url from the user's element.json well-known file and loads the embedded call from that origin, exposing call keys to its controller. Exploitation requires control of the affected user's well-known file and an embedded Element Call; single-organization infrastructure is less exposed.

CVSS severity5.3
Medium
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Element X iOS 1.6.13 through 25.03.7 allows remote attackers to obtain Element Call media encryption keys. The client accepts a widget_url from the user's element.json well-known file and loads the embedded call from that origin, exposing call keys to its controller. Exploitation requires control of the affected user's well-known file and an embedded Element Call; single-organization infrastructure is less exposed.

The record

CVE
CVE-2025-31126
Published
Apr 3, 2025
Updated
Apr 7, 2025
Vendor
Element HQ
Product
Element X iOS
Classifications
CWE-200
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 3, 2025CVE publishedPublication date reported by the CVE source.
  2. Apr 7, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 1.6.13, < 25.03.8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Element HQ · Element X iOSversion=>= 1.6.13, < 25.03.8

Published CVSS scores

5.3GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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