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18 vulnerabilities found for CheckUser by Wikimedia Foundation
CVE-2026-58034 (GCVE-0-2026-58034)
Vulnerability from nvd – Published: 2026-07-01 14:21 – Updated: 2026-07-01 14:46
VLAI
EPSS
VEX
Title
Stored XSS through a system message when blocking a temporary account that's related to other temporary accounts
Summary
Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation CheckUser.
This vulnerability is associated with program files modules/ext.CheckUser.TempAccounts/components/blockConnectedTempAccountsField.Vue.
This issue affects CheckUser: from 1.46.0-rc.0 before 1.46.0.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting')
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Wikimedia Foundation | CheckUser |
Affected:
1.46.0-rc.0 , < 1.46.0
(semver)
|
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CVE-2026-34090 (GCVE-0-2026-34090)
Vulnerability from nvd – Published: 2026-05-11 14:50 – Updated: 2026-05-11 15:51
VLAI
EPSS
VEX
Title
Suggested investigations: Handle suppressed usernames
Summary
Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation CheckUser.
This issue affects CheckUser: from 1.45.0 before 1.45.2.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Wikimedia Foundation | CheckUser |
Affected:
1.45.0 , < 1.45.2
(semver)
|
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CVE-2025-67478 (GCVE-0-2025-67478)
Vulnerability from nvd – Published: 2026-02-03 01:14 – Updated: 2026-03-02 17:43
VLAI
EPSS
VEX
Title
Wrong E-Mail address composition for usernames with a comma and Umlauts in it like "Döe, Jähn"
Summary
Vulnerability in Wikimedia Foundation CheckUser. This vulnerability is associated with program files includes/Mail/UserMailer.Php.
This issue affects CheckUser: from * before 1.39.14, 1.43.4, 1.44.1.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Wikimedia Foundation | CheckUser |
Affected:
* , < 1.39.14, 1.43.4, 1.44.1
(semver)
|
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CVE-2025-61658 (GCVE-0-2025-61658)
Vulnerability from nvd – Published: 2026-02-03 00:59 – Updated: 2026-03-03 15:45
VLAI
EPSS
VEX
Title
Special:GlobalContributions shows edits on wikis the viewer doesn't have access to
Summary
Vulnerability in Wikimedia Foundation CheckUser. This vulnerability is associated with program files src/GlobalContributions/GlobalContributionsPager.Php.
This issue affects CheckUser: from * before 1.43.4, 1.44.1.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Wikimedia Foundation | CheckUser |
Affected:
* , < 1.43.4, 1.44.1
(semver)
|
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CVE-2025-61651 (GCVE-0-2025-61651)
Vulnerability from nvd – Published: 2026-02-03 00:53 – Updated: 2026-02-03 21:08
VLAI
EPSS
VEX
Title
i18n XSS through Special:CheckUser CheckUser helper
Summary
Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation CheckUser. This vulnerability is associated with program files modules/ext.CheckUser/checkuser/checkUserHelper/buildUserElement.Js.
This issue affects CheckUser: from * before 1.44.1.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting')
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Wikimedia Foundation | CheckUser |
Affected:
* , < 1.44.1
(semver)
|
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CVE-2025-61650 (GCVE-0-2025-61650)
Vulnerability from nvd – Published: 2026-02-03 00:15 – Updated: 2026-02-03 21:06
VLAI
EPSS
VEX
Title
UserInfoCard is vulnerable to message key stored XSS
Summary
Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation CheckUser. This vulnerability is associated with program files src/Services/CheckUserUserInfoCardService.Php.
This issue affects CheckUser: from * before 795bf333272206a0189050d975e94b70eb7dc507.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting')
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Wikimedia Foundation | CheckUser |
Affected:
* , < 795bf333272206a0189050d975e94b70eb7dc507
(semver)
|
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CVE-2025-61649 (GCVE-0-2025-61649)
Vulnerability from nvd – Published: 2026-02-03 00:17 – Updated: 2026-03-03 15:46
VLAI
EPSS
VEX
Title
UserInfoCard: Check that performing user has permission to view log entries for number of past blocks
Summary
Vulnerability in Wikimedia Foundation CheckUser. This vulnerability is associated with program files src/Services/CheckUserUserInfoCardService.Php.
This issue affects CheckUser: from 7cedd58781d261f110651b6af4f41d2d11ae7309.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Wikimedia Foundation | CheckUser |
Affected:
7cedd58781d261f110651b6af4f41d2d11ae7309 , < *
(semver)
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CVE-2025-61648 (GCVE-0-2025-61648)
Vulnerability from nvd – Published: 2026-02-03 00:19 – Updated: 2026-02-03 21:06
VLAI
EPSS
VEX
Title
Stored XSS through system messages in CheckUser
Summary
Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation CheckUser. This vulnerability is associated with program files modules/ext.CheckUser.TempAccounts/components/ShowIPButton.Vue, modules/ext.CheckUser.TempAccounts/SpecialBlock.Js.
This issue affects CheckUser: from * before 1.44.1.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting')
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Wikimedia Foundation | CheckUser |
Affected:
* , < 1.44.1
(semver)
|
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CVE-2025-61647 (GCVE-0-2025-61647)
Vulnerability from nvd – Published: 2026-02-03 00:02 – Updated: 2026-03-03 15:41
VLAI
EPSS
VEX
Title
UserInfoCard: Don't allow access to information about users who are suppressed if you don't have suppressor rights
Summary
Vulnerability in Wikimedia Foundation CheckUser. This vulnerability is associated with program files src/Api/Rest/Handler/UserInfoHandler.Php.
This issue affects CheckUser: from a3dc1bbcc33acbcca6831d6afaccbb1054c93a57, 0584eb2ad564648aa3ce9c555dd044dda02b55f4.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Wikimedia Foundation | CheckUser |
Affected:
a3dc1bbcc33acbcca6831d6afaccbb1054c93a57, 0584eb2ad564648aa3ce9c555dd044dda02b55f4 , < *
(semver)
|
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CVE-2026-58034 (GCVE-0-2026-58034)
Vulnerability from cvelistv5 – Published: 2026-07-01 14:21 – Updated: 2026-07-01 14:46
VLAI
EPSS
VEX
Title
Stored XSS through a system message when blocking a temporary account that's related to other temporary accounts
Summary
Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation CheckUser.
This vulnerability is associated with program files modules/ext.CheckUser.TempAccounts/components/blockConnectedTempAccountsField.Vue.
This issue affects CheckUser: from 1.46.0-rc.0 before 1.46.0.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting')
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Wikimedia Foundation | CheckUser |
Affected:
1.46.0-rc.0 , < 1.46.0
(semver)
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CVE-2026-34090 (GCVE-0-2026-34090)
Vulnerability from cvelistv5 – Published: 2026-05-11 14:50 – Updated: 2026-05-11 15:51
VLAI
EPSS
VEX
Title
Suggested investigations: Handle suppressed usernames
Summary
Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation CheckUser.
This issue affects CheckUser: from 1.45.0 before 1.45.2.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Wikimedia Foundation | CheckUser |
Affected:
1.45.0 , < 1.45.2
(semver)
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CVE-2025-67478 (GCVE-0-2025-67478)
Vulnerability from cvelistv5 – Published: 2026-02-03 01:14 – Updated: 2026-03-02 17:43
VLAI
EPSS
VEX
Title
Wrong E-Mail address composition for usernames with a comma and Umlauts in it like "Döe, Jähn"
Summary
Vulnerability in Wikimedia Foundation CheckUser. This vulnerability is associated with program files includes/Mail/UserMailer.Php.
This issue affects CheckUser: from * before 1.39.14, 1.43.4, 1.44.1.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Wikimedia Foundation | CheckUser |
Affected:
* , < 1.39.14, 1.43.4, 1.44.1
(semver)
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CVE-2025-61658 (GCVE-0-2025-61658)
Vulnerability from cvelistv5 – Published: 2026-02-03 00:59 – Updated: 2026-03-03 15:45
VLAI
EPSS
VEX
Title
Special:GlobalContributions shows edits on wikis the viewer doesn't have access to
Summary
Vulnerability in Wikimedia Foundation CheckUser. This vulnerability is associated with program files src/GlobalContributions/GlobalContributionsPager.Php.
This issue affects CheckUser: from * before 1.43.4, 1.44.1.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Wikimedia Foundation | CheckUser |
Affected:
* , < 1.43.4, 1.44.1
(semver)
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CVE-2025-61651 (GCVE-0-2025-61651)
Vulnerability from cvelistv5 – Published: 2026-02-03 00:53 – Updated: 2026-02-03 21:08
VLAI
EPSS
VEX
Title
i18n XSS through Special:CheckUser CheckUser helper
Summary
Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation CheckUser. This vulnerability is associated with program files modules/ext.CheckUser/checkuser/checkUserHelper/buildUserElement.Js.
This issue affects CheckUser: from * before 1.44.1.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting')
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Wikimedia Foundation | CheckUser |
Affected:
* , < 1.44.1
(semver)
|
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CVE-2025-61648 (GCVE-0-2025-61648)
Vulnerability from cvelistv5 – Published: 2026-02-03 00:19 – Updated: 2026-02-03 21:06
VLAI
EPSS
VEX
Title
Stored XSS through system messages in CheckUser
Summary
Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation CheckUser. This vulnerability is associated with program files modules/ext.CheckUser.TempAccounts/components/ShowIPButton.Vue, modules/ext.CheckUser.TempAccounts/SpecialBlock.Js.
This issue affects CheckUser: from * before 1.44.1.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting')
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Wikimedia Foundation | CheckUser |
Affected:
* , < 1.44.1
(semver)
|
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CVE-2025-61649 (GCVE-0-2025-61649)
Vulnerability from cvelistv5 – Published: 2026-02-03 00:17 – Updated: 2026-03-03 15:46
VLAI
EPSS
VEX
Title
UserInfoCard: Check that performing user has permission to view log entries for number of past blocks
Summary
Vulnerability in Wikimedia Foundation CheckUser. This vulnerability is associated with program files src/Services/CheckUserUserInfoCardService.Php.
This issue affects CheckUser: from 7cedd58781d261f110651b6af4f41d2d11ae7309.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Wikimedia Foundation | CheckUser |
Affected:
7cedd58781d261f110651b6af4f41d2d11ae7309 , < *
(semver)
|
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CVE-2025-61650 (GCVE-0-2025-61650)
Vulnerability from cvelistv5 – Published: 2026-02-03 00:15 – Updated: 2026-02-03 21:06
VLAI
EPSS
VEX
Title
UserInfoCard is vulnerable to message key stored XSS
Summary
Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation CheckUser. This vulnerability is associated with program files src/Services/CheckUserUserInfoCardService.Php.
This issue affects CheckUser: from * before 795bf333272206a0189050d975e94b70eb7dc507.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting')
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Wikimedia Foundation | CheckUser |
Affected:
* , < 795bf333272206a0189050d975e94b70eb7dc507
(semver)
|
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CVE-2025-61647 (GCVE-0-2025-61647)
Vulnerability from cvelistv5 – Published: 2026-02-03 00:02 – Updated: 2026-03-03 15:41
VLAI
EPSS
VEX
Title
UserInfoCard: Don't allow access to information about users who are suppressed if you don't have suppressor rights
Summary
Vulnerability in Wikimedia Foundation CheckUser. This vulnerability is associated with program files src/Api/Rest/Handler/UserInfoHandler.Php.
This issue affects CheckUser: from a3dc1bbcc33acbcca6831d6afaccbb1054c93a57, 0584eb2ad564648aa3ce9c555dd044dda02b55f4.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Wikimedia Foundation | CheckUser |
Affected:
a3dc1bbcc33acbcca6831d6afaccbb1054c93a57, 0584eb2ad564648aa3ce9c555dd044dda02b55f4 , < *
(semver)
|
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"repo": "https://gerrit.wikimedia.org/g/mediawiki/extensions/CheckUser/+/refs/heads/master",
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