CVE-2026-58034— Stored XSS through a system message when blocking a temporary account that's related to other temporary accounts
Possible ATT&CK Techniques 2AI
T1059 · Command and Scripting Interpreter T1189 · Drive-by CompromiseAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Wikimedia Foundation | CheckUser | 1.46.0-rc.0< 1.46.0 | affected |
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I. Basic Information for CVE-2026-58034
Vulnerability Information
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Vulnerability Title
Stored XSS through a system message when blocking a temporary account that's related to other temporary accounts
Source: NVD (National Vulnerability Database)
Vulnerability Description
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.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: NVD (National Vulnerability Database)
Vulnerability Title
Wikimedia Foundation CheckUser 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Wikimedia Foundation CheckUser是Wikimedia Foundation的用户权限审计工具。 Wikimedia Foundation CheckUser 1.46.0之前版本存在跨站脚本漏洞，该漏洞源于网页生成期间输入中和不当（跨站脚本），此漏洞与程序文件modules/ext.CheckUser.TempAccounts/components/blockConnectedTempAccountsField.Vue相关。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Wikimedia Foundation | CheckUser | 1.46.0-rc.0 ~ 1.46.0 | - |
II. Public POCs for CVE-2026-58034
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2026-58034 (1)
Same Patch Batch · Wikimedia Foundation · 2026-07-01 · 18 CVEs total
| CVE-2026-58038 | Stored XSS through javascript URLs in SVGs generated by EasyTimeline | |
| CVE-2026-8857 | Full RCE using EasyTimeline Extension | |
| CVE-2026-13706 | UrlShortener extension url validation can be bypassed due to difference between php url pa | |
| CVE-2026-13707 | Session fixation attacks on improperly configured OAuth 1.0a tools | |
| CVE-2026-58028 | Pretty-printed API output combined with centralauthtoken allows XSS with certain gadgets | |
| CVE-2026-58029 | Full Account Takeover from BotPasswords and OAuth via action=changeauthenticationdata | |
| CVE-2026-58036 | Users API leaks whether privileged users have their user groups disabled for lack of 2FA | |
| CVE-2026-58030 | SyntaxHighlight stored XSS via unsanitized 'linelinks' attribute | |
| CVE-2026-58033 | "Total number of distinct authors" statistic at action=info does not exclude revisions whe | |
| CVE-2026-58037 | Core log entries for exceptions and XSS issues in log entry formatting code that may be ca | |
| CVE-2026-58027 | QueryAbuseFilter API can be used to see the hit count of private filters, which is hidden | |
| CVE-2026-58031 | Stored i18n XSS in Special:ApiSandbox when a deprecated module is selected | |
| CVE-2026-58032 | mw.Api.getErrorMessage() may return injected HTML if used without errorformat=html | |
| CVE-2026-58024 | API identification of users on private wikis | |
| CVE-2026-58025 | Remote Code Execution via Unsafe Deserialization in LogItem Import | |
| CVE-2026-58026 | $wgNonincludableNamespaces can be bypassed by embedding redirect in other namespaces | |
| CVE-2026-58035 | Stored XSS through a system message in the codex version of Special:Block |
IV. Related Vulnerabilities
Same product: CheckUser
- CVE-2026-34090
Suggested investigations: Handle suppressed usernames - CVE-2025-67478
Wrong E-Mail address composition for usernames with a comma - CVE-2025-61658
Special:GlobalContributions shows edits on wikis the viewer - CVE-2025-61651
i18n XSS through Special:CheckUser CheckUser helper - CVE-2025-61648
Stored XSS through system messages in CheckUser
Same vendor: Wikimedia Foundation
- CVE-2026-58025
Remote Code Execution via Unsafe Deserialization in LogItem - CVE-2026-58029
Full Account Takeover from BotPasswords and OAuth via action - CVE-2026-58028
Pretty-printed API output combined with centralauthtoken all - CVE-2026-58026
$wgNonincludableNamespaces can be bypassed by embedding redi - CVE-2026-8857
Full RCE using EasyTimeline Extension
Same weakness: CWE-79
- CVE-2026-15505
vnotex vnote YAML Frontmatter markdownit.js cross site scrip - CVE-2026-61876
LuCI DHCPv6 Lease Hostname Stored Cross-Site Scripting - CVE-2026-61875
luci-app-upnp Stored XSS via UPnP Port Mapping Description - CVE-2026-15493
Akpali9 Attendance-Management-System absent.php cross site s - CVE-2026-15492
igweze wizgrade studentConductManager.php cross site scripti
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