CVE-2023-22912

MEDIUM

5.3

CVSS Score

Published: January 20, 2023 at 12:00 AM UTC

Updated: June 17, 2026 at 05:36 AM UTC

1 product affected across 1 vendorMediaWiki

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Severity

MEDIUM5.3

Exploit prediction

EPSS 0.4%

SSVC

PoC

Description

An issue was discovered in MediaWiki before 1.35.9, 1.36.x through 1.38.x before 1.38.5, and 1.39.x before 1.39.1. CheckUser TokenManager insecurely uses AES-CTR encryption with a repeated (aka re-used) nonce, allowing an adversary to decrypt.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

MediaWiki · Mediawiki

95%

v < 1.35.91.36.0 ≤ v < 1.38.51.39.0 1.39.0 rc0 1.39.0 rc1

Affected range stops below 1.35.9, so it looks safe — our inference, not a vendor statement

Affected range stops below 1.38.5, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

https://phabricator.wikimedia.org/T315123

References (1)

ExploitIssue TrackingPatchVendor Advisory

Source: [email protected]

https://phabricator.wikimedia.org/T315123

SSVC — Action Prioritization

SSVCPoCAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.3MEDIUMCISA-ADP

Attack Vector: NETWORK
Complexity: LOW
Privileges: NONE
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: LOW
Integrity: NONE
Availability: NONE

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-330

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