CVE-2020-10660Network attack vector

Retained group privileges via skipped membership refresh

Published Mar 23, 2020 · Updated Aug 4, 2024

Improper privilege management in Vault and Vault Enterprise 0.9.0 through 1.3.3 allows remote authenticated users to retain revoked group access. During login or token renewal, the identity-store refresh is skipped when an authentication method returns no group aliases, leaving stale external Entity-Group mappings intact. Exploitation requires third-party authentication, group-backed policies, removal of every external group, and reauthentication; the resulting token retains the removed groups' permissions.

CVSS severity6.9
Medium
EPSS probability0.76%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper privilege management in Vault and Vault Enterprise 0.9.0 through 1.3.3 allows remote authenticated users to retain revoked group access. During login or token renewal, the identity-store refresh is skipped when an authentication method returns no group aliases, leaving stale external Entity-Group mappings intact. Exploitation requires third-party authentication, group-backed policies, removal of every external group, and reauthentication; the resulting token retains the removed groups' permissions.

The record

CVE
CVE-2020-10660
Published
Mar 23, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-269, CWE-276, T1078
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 23, 2020CVE 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.3NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
6.9GitHub Advisory DatabaseCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
4.3NIST National Vulnerability DatabaseAV:N/AC:M/Au:N/C:N/I:P/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)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-269Improper Privilege Management
CWE-276Incorrect Default Permissions
T1078Valid Accounts

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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