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CVE-2023-45363

MediaWiki Denial of Service vulnerability

7.5 HighFix available

An issue was discovered in ApiPageSet.php in MediaWiki before 1.35.12, 1.36.x through 1.39.x before 1.39.5, and 1.40.x before 1.40.1. It allows attackers to cause a denial of service (unbounded loop and RequestTimeoutException) when querying pages redirected to other variants with redirects and converttitles set.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
High

Exploit likelihood

23.8%Up 23.7 points since Oct 9, 2023
90%50%10%1%

What each source reports

NVD Score used 7.5

An issue was discovered in ApiPageSet.php in MediaWiki before 1.35.12, 1.36.x through 1.39.x before 1.39.5, and 1.40.x before 1.40.1. It allows attackers to cause a denial of service (unbounded loop and RequestTimeoutException) when querying pages redirected to other variants with redirects and converttitles set.

Record
CVE-2023-45363
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-835
Updated
2026-11-02
CVE List 7.5

An issue was discovered in ApiPageSet.php in MediaWiki before 1.35.12, 1.36.x through 1.39.x before 1.39.5, and 1.40.x before 1.40.1. It allows attackers to cause a denial of service (unbounded loop and RequestTimeoutException) when querying pages redirected to other variants with redirects and converttitles set.

Record
CVE-2023-45363
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-835
Updated
2026-11-02
EUVDEUVD-2023-2825 7.5

An issue was discovered in ApiPageSet.php in MediaWiki before 1.35.12, 1.36.x through 1.39.x before 1.39.5, and 1.40.x before 1.40.1. It allows attackers to cause a denial of service (unbounded loop and RequestTimeoutException) when querying pages redirected to other variants with redirects and converttitles set.

Record
EUVD-2023-2825
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-03
GitHub AdvisoriesGHSA-w5fx-cx7f-6vr9 8.7

MediaWiki Denial of Service vulnerability

An issue was discovered in ApiPageSet.php in MediaWiki before 1.35.12, 1.36.x through 1.39.x before 1.39.5, and 1.40.x before 1.40.1. It allows attackers to cause a denial of service (unbounded loop and RequestTimeoutException) when querying pages redirected to other variants with redirects and converttitles set.

Record
GHSA-w5fx-cx7f-6vr9
CVSS 4.0
8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-835
Updated
2026-11-02
OSV 7.5

An issue was discovered in ApiPageSet.php in MediaWiki before 1.35.12, 1.36.x through 1.39.x before 1.39.5, and 1.40.x before 1.40.1. It allows attackers to cause a denial of service (unbounded loop and RequestTimeoutException) when querying pages redirected to other variants with redirects and converttitles set.

Record
CVE-2023-45363
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVDEBIAN-CVE-2023-45363 7.5

An issue was discovered in ApiPageSet.php in MediaWiki before 1.35.12, 1.36.x through 1.39.x before 1.39.5, and 1.40.x before 1.40.1. It allows attackers to cause a denial of service (unbounded loop and RequestTimeoutException) when querying pages redirected to other variants with redirects and converttitles set.

Record
DEBIAN-CVE-2023-45363
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
Show 4 moreShow less
OSVGHSA-w5fx-cx7f-6vr9 8.7

MediaWiki Denial of Service vulnerability

An issue was discovered in ApiPageSet.php in MediaWiki before 1.35.12, 1.36.x through 1.39.x before 1.39.5, and 1.40.x before 1.40.1. It allows attackers to cause a denial of service (unbounded loop and RequestTimeoutException) when querying pages redirected to other variants with redirects and converttitles set.

Record
GHSA-w5fx-cx7f-6vr9
CVSS 4.0
8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-835
Updated
2026-11-02
OSVUBUNTU-CVE-2023-45363 7.5

An issue was discovered in ApiPageSet.php in MediaWiki before 1.35.12, 1.36.x through 1.39.x before 1.39.5, and 1.40.x before 1.40.1. It allows attackers to cause a denial of service (unbounded loop and RequestTimeoutException) when querying pages redirected to other variants with redirects and converttitles set.

Record
UBUNTU-CVE-2023-45363
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVBIT-mediawiki-2023-45363 No score

An issue was discovered in ApiPageSet.php in MediaWiki before 1.35.12, 1.36.x through 1.39.x before 1.39.5, and 1.40.x before 1.40.1. It allows attackers to cause a denial of service (unbounded loop and RequestTimeoutException) when querying pages redirected to other variants with redirects and converttitles set.

Record
BIT-mediawiki-2023-45363
Updated
2026-11-02
OSVMGASA-2024-0155 No score

Updated mediawiki packages fix security vulnerabilities

Mediawiki v1.40.0 does not validate namespaces used in XML files. Therefore, if the instance administrator allows XML file uploads, a remote attacker with a low-privileged user account can use this exploit to become an administrator by sending a malicious link to the instance administrator. (CVE-2023-3550) An issue was discovered in MediaWiki before 1.35.12, 1.36.x through 1.39.x before 1.39.5, and 1.40.x before 1.40.1. There is XSS in youhavenewmessagesmanyusers and youhavenewmessages i18n messages. This is related to MediaWiki:Youhavenewmessagesfromusers. (CVE-2023-45360) An issue was discovered in DifferenceEngine.php in MediaWiki before 1.35.12, 1.36.x through 1.39.x before 1.39.5, and 1.40.x before 1.40.1. diff-multi-sameuser (aka "X intermediate revisions by the same user not shown") ignores username suppression. This is an information leak. (CVE-2023-45362) An issue was discovered in ApiPageSet.php in MediaWiki before 1.35.12, 1.36.x through 1.39.x before 1.39.5, and 1.40.x before 1.40.1. It allows attackers to cause a denial of service (unbounded loop and RequestTimeoutException) when querying pages redirected to other variants with redirects and converttitles set. (CVE-2023-45363) An issue was discovered in includes/page/Article.php in MediaWiki 1.36.x through 1.39.x before 1.39.5 and 1.40.x before 1.40.1. Deleted revision existence is leaked due to incorrect permissions being checked. This reveals that a given revision ID belonged to the given page title, and its timestamp, both of which are not supposed to be public information. (CVE-2023-45364) An issue was discovered in MediaWiki before 1.35.14, 1.36.x through 1.39.x before 1.39.6, and 1.40.x before 1.40.2. In includes/logging/RightsLogFormatter.php, group-*-member messages can result in XSS on Special:log/rights. (CVE-2023-51704)

Record
MGASA-2024-0155
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
mediawiki/core
Packagist
 before 1.35.12
1.35.12
mediawiki/core
Packagist
 1.36.0 up to 1.39.5
1.39.5
mediawiki/core
Packagist
 1.40.0 to 1.40.0
1.40.1
mediawiki
Bitnami
 before 1.35.12, 1.36.0 up to 1.39.5, 1.40.0 up to 1.40.1
1.35.121.39.51.40.1
mediawiki
Debian:12
 before 1:1.39.5-1~deb12u1, plus listed versions
1:1.39.2-11:1.39.4-11:1.39.4-1~deb12u11:1.39.4-2
1:1.39.5-1~deb12u1
mediawiki
Debian:13
 before 1:1.39.5-1
1:1.39.5-1
mediawiki
Debian:14
 before 1:1.39.5-1
1:1.39.5-1
mediawiki
Debian:10
From an advisory covering 3 CVEs
 before 1:1.31.16-1+deb10u7, plus listed versions
1:1.31.10-1~deb10u11:1.31.12-1~deb10u11:1.31.14-1~deb10u11:1.31.16-1+deb10u21:1.31.16-1+deb10u3
Show 15 moreShow less
1:1.31.16-1+deb10u41:1.31.16-1+deb10u51:1.31.16-1+deb10u61:1.31.16-1~deb10u11:1.31.2-11:1.31.4-11:1.31.4-1~deb10u11:1.31.5-11:1.31.5-21:1.31.5-31:1.31.6-11:1.31.6-1~deb10u11:1.31.7-11:1.31.7-1~deb10u11:1.31.8-1
1:1.31.16-1+deb10u7
mediawiki
Debian:11
From an advisory covering 4 CVEs
 before 1:1.35.13-1~deb11u1, plus listed versions
1:1.35.11-1~deb11u11:1.35.2-11:1.35.3-11:1.35.4-11:1.35.4-1+deb11u2
Show 8 moreShow less
1:1.35.4-1~deb11u11:1.35.5-11:1.35.5-21:1.35.6-11:1.35.7-11:1.35.8-11:1.35.8-1.11:1.35.8-1~deb11u1
1:1.35.13-1~deb11u1
mediawiki
Debian:12
From an advisory covering 4 CVEs
 before 1:1.39.5-1~deb12u1, plus listed versions
1:1.39.2-11:1.39.4-11:1.39.4-1~deb12u11:1.39.4-2
1:1.39.5-1~deb12u1
Show 11 moreShow less
Affected packages
PackageAffectedFixed
mediawiki/core
Packagist
 before 1.35.12, plus listed versions
1.20.31.20.41.20.51.20.61.20.7
Show 45 moreShow less
1.20.81.21.01.21.11.21.101.21.111.21.21.21.31.21.41.21.51.21.61.21.71.21.81.21.91.22.0rc01.24.01.24.0-rc.01.24.0-rc.11.24.0-rc.21.24.0-rc.31.24.11.24.21.24.31.24.41.24.51.24.61.25.01.25.0-rc.01.25.11.25.21.25.31.25.41.25.51.25.61.26.01.26.11.26.21.26.31.26.41.27.01.27.0-rc.01.27.0-rc.11.27.11.27.21.27.31.27.4
1.35.12
mediawiki/core
Packagist
 1.36.0 up to 1.39.5, plus listed versions
1.36.11.36.21.36.31.36.41.37.0
Show 26 moreShow less
1.37.0-rc.01.37.0-rc.11.37.0-rc.21.37.11.37.21.37.31.37.41.37.51.37.61.38.01.38.0-rc.01.38.0-rc.11.38.11.38.21.38.31.38.41.38.51.38.61.38.71.39.01.39.0-rc.01.39.0-rc.11.39.11.39.21.39.31.39.4
1.39.5
mediawiki/core
Packagist
 1.40.0 up to 1.40.1
1.40.1
mediawiki
Mageia:9
From an advisory covering 8 CVEs
 before 1.35.14-1.mga9
1.35.14-1.mga9
mediawiki
Ubuntu:18.04:LTS
 All versions, plus listed versions
1:1.27.3-11:1.27.4-11:1.27.4-21:1.27.4-3
 None known
mediawiki
Ubuntu:Pro:20.04:LTS
 All versions, plus listed versions
1:1.31.2-1ubuntu11:1.31.5-11:1.31.5-1ubuntu11:1.31.5-21:1.31.5-3
Show 4 moreShow less
1:1.31.5-3ubuntu11:1.31.6-11:1.31.7-11:1.31.7-1ubuntu0.1~esm1
 None known
mediawiki
Ubuntu:Pro:22.04:LTS
 All versions, plus listed versions
1:1.35.3-11:1.35.4-11:1.35.5-11:1.35.5-1ubuntu11:1.35.5-1ubuntu21:1.35.5-1ubuntu31:1.35.6-11:1.35.6-1ubuntu0.1~esm1
 None known
mediawiki
Ubuntu:Pro:24.04:LTS
 All versions, plus listed versions
1:1.39.4-21:1.39.5-11:1.39.6-11:1.39.7-11:1.39.7-1ubuntu0.1~esm1
 None known
mediawiki
Ubuntu:25.10
 All versions, plus listed versions
1:1.43.1+dfsg-11:1.43.1+dfsg-21:1.43.3+dfsg-1
 None known
mediawiki
Ubuntu:26.10
 All versions, plus listed versions
1:1.43.8+dfsg-21:1.43.9+dfsg-11:1.43.9+dfsg-1ubuntu1
 None known
mediawiki
Ubuntu:26.04:LTS
 All versions, plus listed versions
1:1.43.3+dfsg-11:1.43.5+dfsg-11:1.43.6+dfsg-21:1.43.8+dfsg-11:1.43.8+dfsg-2
 None known

History

History
RecordedChangedSources
affected, facts
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2023-45363 is a high vulnerability (CVSS 7.5) in Mediawiki, published October 9, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 23.8%, the 97th percentile. Fixed in mediawiki/core 1.35.12.

References

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This page doesn't list everything

Left out here: 78 versions. The JSON record has them.

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