CVE-2023-22473Public exploit

File and conversation disclosure via passcode bypass

Published Jan 9, 2023 · Updated Mar 10, 2025

Improper access control in Nextcloud Talk Android before 15.0.2 allows physically proximate attackers to read files and conversations. The notification-opening flow raises conversation controllers above the passcode screen instead of keeping the authentication controller foremost. Physical possession of a device with a configured Nextcloud account is required, and the observed impact is limited to reading that account's files and conversations.

CVSS severity2.1
Low
EPSS probability0.56%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in Nextcloud Talk Android before 15.0.2 allows physically proximate attackers to read files and conversations. The notification-opening flow raises conversation controllers above the passcode screen instead of keeping the authentication controller foremost. Physical possession of a device with a configured Nextcloud account is required, and the observed impact is limited to reading that account's files and conversations.

The record

CVE
CVE-2023-22473
Published
Jan 9, 2023
Updated
Mar 10, 2025
Vendor
Nextcloud GmbH
Product
Security Advisories
Classifications
CWE-284, T1530
Attack vector
physical
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 9, 2023CVE publishedPublication date reported by the CVE source.
  2. Mar 10, 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=< 15.0.2

What conditions does exploitation require?

Attack vectorphysical
Required privilegesunauthenticated

What is affected?

Nextcloud GmbH · Security Advisoriesversion=< 15.0.2

Published CVSS scores

2.1GitHubCVSS:3.1/AV:P/AC:L/PR:N/UI:R/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.

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No observations available

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

Weakness, pattern, technique

CWE-284Improper Access Control
T1530Data from Cloud Storage

Public exploit references

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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