CVE-2023-45363Network attack vector

Unauthenticated denial of service via redirect loop

Published Oct 9, 2023 · Updated Oct 15, 2024

Denial of service in MediaWiki releases before 1.35.12, 1.39.5, or 1.40.1 allows remote attackers to interrupt service via API queries. ApiPageSet.php repeatedly resolves redirects that convert to another language variant when both redirects and converttitles are enabled, creating an unbounded loop that ends in RequestTimeoutException. The request requires no authentication or user interaction and can exhaust request processing, affecting availability without disclosing or modifying data.

CVSS severity7.5
High
EPSS probability22.70%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in MediaWiki releases before 1.35.12, 1.39.5, or 1.40.1 allows remote attackers to interrupt service via API queries. ApiPageSet.php repeatedly resolves redirects that convert to another language variant when both redirects and converttitles are enabled, creating an unbounded loop that ends in RequestTimeoutException. The request requires no authentication or user interaction and can exhaust request processing, affecting availability without disclosing or modifying data.

The record

CVE
CVE-2023-45363
Published
Oct 9, 2023
Updated
Oct 15, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-835, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 9, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.7GitHub Advisory DatabaseCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
7.5GitHub Advisory DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-835Loop with Unreachable Exit Condition ('Infinite Loop')
T1499Endpoint Denial of Service

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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