CVE-2023-26041Network attack vector

Expired-message disclosure via missing API expiration filtering

Published Feb 27, 2023 · Updated Mar 10, 2025

Information disclosure in Nextcloud Talk 15.0.0 through 15.0.2 allows remote authenticated users to read expired chat messages. ChatController returns expired message records through the chat API without checking expiration timestamps when the expiration cron job fails to delete them. Access requires conversation participation, a misconfigured cron job, and interaction that loads chat history; exposure is limited to messages the interface has hidden as expired.

CVSS severity2.6
Low
EPSS probability0.80%
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 Nextcloud Talk 15.0.0 through 15.0.2 allows remote authenticated users to read expired chat messages. ChatController returns expired message records through the chat API without checking expiration timestamps when the expiration cron job fails to delete them. Access requires conversation participation, a misconfigured cron job, and interaction that loads chat history; exposure is limited to messages the interface has hidden as expired.

The record

CVE
CVE-2023-26041
Published
Feb 27, 2023
Updated
Mar 10, 2025
Vendor
Nextcloud GmbH
Product
Security Advisories
Classifications
CWE-359, T1213
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 27, 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=< 15.0.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Nextcloud GmbH · Security Advisoriesversion=< 15.0.3

Published CVSS scores

2.6GitHubCVSS:3.1/AV:N/AC:H/PR:L/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-359Exposure of Private Personal Information to an Unauthorized Actor
T1213Data from Information Repositories

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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