CVE-2023-32318

Prior-account takeover via persisted direct-editing session

Published May 26, 2023 · Updated Jan 14, 2025

Insufficient session expiration in affected Nextcloud Server and Enterprise Server releases allows local users to assume a prior user's account. The Text app's SessionController sets the direct-editing user during push and sync requests but fails to restore the original session user afterward. A prior logout, an uncleared browser cookie, and authentication to another account expose the prior user's permissions in versions 25.0.2 through 25.0.5 and 26.0.0.

CVSS severity7.2
High
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Insufficient session expiration in affected Nextcloud Server and Enterprise Server releases allows local users to assume a prior user's account. The Text app's SessionController sets the direct-editing user during push and sync requests but fails to restore the original session user afterward. A prior logout, an uncleared browser cookie, and authentication to another account expose the prior user's permissions in versions 25.0.2 through 25.0.5 and 26.0.0.

The record

CVE
CVE-2023-32318
Published
May 26, 2023
Updated
Jan 14, 2025
Vendor
Nextcloud GmbH
Product
Security Advisories
Classifications
CWE-613, T1550.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 26, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 14, 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=>= 25.0.2, < 25.0.6
  2. Affected versionversion=>= 26.0.0, < 26.0.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Nextcloud GmbH · Security Advisoriesversion=>= 25.0.2, < 25.0.6; version=>= 26.0.0, < 26.0.1

Published CVSS scores

7.2GitHub, Inc.CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:H/I:H/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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-613Insufficient Session Expiration
T1550.004Use Alternate Authentication Material: Web Session Cookie

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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