CVE-2022-28205Network attack vector

Persistent privileges via incorrect group-expiration TTL

Published Mar 30, 2022 · Updated Aug 3, 2024

Authorization failure in MediaWiki through 1.37.1 allows remote authenticated users to retain expired CentralAuth global privileges. CentralAuth assigns an incorrect cache TTL to future-dated global-group expirations and can reuse cached user entries after a group expires. Exploitation requires an authenticated account previously placed in a time-limited global group by a steward; the associated permissions then remain usable beyond their intended expiry.

CVSS severity9.8
Critical
EPSS probability1.46%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authorization failure in MediaWiki through 1.37.1 allows remote authenticated users to retain expired CentralAuth global privileges. CentralAuth assigns an incorrect cache TTL to future-dated global-group expirations and can reuse cached user entries after a group expires. Exploitation requires an authenticated account previously placed in a time-limited global group by a steward; the associated permissions then remain usable beyond their intended expiry.

The record

CVE
CVE-2022-28205
Published
Mar 30, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1078
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 30, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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

7.5NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:P
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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 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

T1078Valid Accounts

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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