CVE-2024-52519

OAuth2 secret disclosure via reversible database encryption

Published Nov 15, 2024 · Updated Nov 15, 2024

Insecure storage in Nextcloud Server 28.0.0 through 28.0.9 and 29.0.0 through 29.0.6 allows attackers to recover OAuth2 client secrets. The OAuth2 SettingsController encrypted each generated secret with ICrypto and saved reversible ciphertext in oauth2_clients instead of storing an HMAC. Exploitation requires both a database backup and the matching Nextcloud configuration file, which together permit decryption of the stored secrets.

CVSS severity2.7
Low
EPSS probability0.50%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Insecure storage in Nextcloud Server 28.0.0 through 28.0.9 and 29.0.0 through 29.0.6 allows attackers to recover OAuth2 client secrets. The OAuth2 SettingsController encrypted each generated secret with ICrypto and saved reversible ciphertext in oauth2_clients instead of storing an HMAC. Exploitation requires both a database backup and the matching Nextcloud configuration file, which together permit decryption of the stored secrets.

The record

CVE
CVE-2024-52519
Published
Nov 15, 2024
Updated
Nov 15, 2024
Vendor
Nextcloud GmbH
Product
Security Advisories
Classifications
CWE-922, T1552.001
Attack vector
physical
Privileges
admin

Timeline

How it unfolded

  1. Nov 15, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 15, 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=>= 28.0.0, < 28.0.10
  2. Affected versionversion=>= 29.0.0, < 29.0.7

What conditions does exploitation require?

Attack vectorphysical
Required privilegesadmin

What is affected?

Nextcloud GmbH · Security Advisoriesversion=>= 28.0.0, < 28.0.10; version=>= 29.0.0, < 29.0.7

Published CVSS scores

8.2NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
2.7GitHub, Inc.CVSS:3.1/AV:P/AC:H/PR:H/UI:R/S:U/C:L/I:L/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)
Vectorphysical
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-922Insecure Storage of Sensitive Information
T1552.001Unsecured Credentials: Credentials In Files

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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