CVE-2020-8296Public exploit

Password disclosure via unnecessary reversible credential storage

Published Mar 3, 2021 · Updated Aug 4, 2024

Credential exposure in Nextcloud Server before 20.0.0 allows local users with database and configuration access to recover passwords. The login-credential handler reversibly encrypts each login password with the server secret and writes it to oc_credentials even when no external storage needs it. Possession of both the database and server configuration permits password recovery and subsequent access to affected users' accounts.

CVSS severity6.7
Medium
EPSS probability0.51%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Credential exposure in Nextcloud Server before 20.0.0 allows local users with database and configuration access to recover passwords. The login-credential handler reversibly encrypts each login password with the server secret and writes it to oc_credentials even when no external storage needs it. Possession of both the database and server configuration permits password recovery and subsequent access to affected users' accounts.

The record

CVE
CVE-2020-8296
Published
Mar 3, 2021
Updated
Aug 4, 2024
Vendor
Nextcloud GmbH
Product
Nextcloud Server
Classifications
CWE-521, CWE-257, T1555
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Mar 3, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record 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=Fixed in 20.0.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

Nextcloud GmbH · Nextcloud Serverversion=Fixed in 20.0.0

Published CVSS scores

4.6NIST NVDAV:L/AC:L/Au:N/C:P/I:P/A:P
6.7NIST NVDCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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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)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-521Weak Password Requirements
CWE-257Storing Passwords in a Recoverable Format
T1555Credentials from Password Stores

Public exploit references

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Technologies

Your stack

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Your stack

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