CVE-2026-104448

YesWiki before 4.6.7 CSRF Page Deletion via ajaxdeletepage Handler

YesWiki before 4.6.7 contains a cross-site request forgery vulnerability in the ajaxdeletepage handler, which permanently deletes a page on any GET request carrying a jsonp_callback parameter without checking a CSRF token. Attackers can lure a logged-in administrator or page owner to a crafted link to delete arbitrary pages along with their ACLs, links, triples, comments and referrers.

CVSS 4.0 · 7.2 High EPSS < 1% KEV · Not listed

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Yeswiki

CVE-2026-104446

YesWiki before 4.6.7 Unauthenticated Open Mail Relay via Contact Mail Handler

YesWiki before 4.6.7 contains an authentication bypass in the contact mail AJAX handler that allows unauthenticated attackers to send email through the wiki's SMTP server. Attackers can POST an XMLHttpRequest to the mail handler without field or type parameters, supplying arbitrary recipient, sender, subject and body for spam and phishing.

CVSS 4.0 · 6.9 Medium EPSS < 1% KEV · Not listed

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Yeswiki

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Yeswiki

CVE-2026-104440

YesWiki before 4.6.7 Blind SSRF via bazarlist API idtypeannonce Parameter

YesWiki before 4.6.7 contains a blind server-side request forgery vulnerability that allows unauthenticated attackers to make arbitrary server-side requests via the idtypeannonce parameter of /api/entries/bazarlist. Because isValidURL() always returns true, attackers can supply internal URLs fetched by curl in loadURLContent() to probe internal networks and reach internal services or metadata endpoints.

CVSS 4.0 · 6.9 Medium EPSS < 1% KEV · Not listed

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Yeswiki

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Yeswiki

CVE-2026-104471

YesWiki before 4.6.7 Unrestricted File Upload via Bazar CSV Import

YesWiki before 4.6.7 contains an unrestricted file upload vulnerability that allows authenticated admins to write remote files into the web-accessible files/ directory via Bazar CSV import preview. Attackers can import a CSV whose file or image field references a remote .php URL, which is saved without extension checks and executed as server-side code.

CVSS 4.0 · 8.6 High EPSS < 1% KEV · Not listed

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Yeswiki

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Yeswiki

CVE-2026-104463

YesWiki before 4.6.7 Unauthenticated SSRF via ActivityPub Inbox

YesWiki before 4.6.7 contains a server-side request forgery vulnerability that allows unauthenticated attackers to trigger server requests by sending signed Follow activities to the public forms actor inbox route. Attackers sign requests with their own keyId while supplying internal actor URLs in the body, reaching internal hosts or cloud metadata via blind GET and POST requests.

CVSS 4.0 · 8.3 High EPSS < 1% KEV · Not listed

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Yeswiki

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Yeswiki

CVE-2026-104459

YesWiki before 4.6.7 SSRF via ActivityPub WebFinger actor_handle

YesWiki before 4.6.7 contains a server-side request forgery vulnerability in WebfingerService that allows unauthenticated attackers to trigger HTTPS requests to internal hosts. Attackers can POST a crafted actor_handle with a numeric host and port to the abonnements view to probe internal HTTPS services and ports.

CVSS 4.0 · 6.9 Medium EPSS < 1% KEV · Not listed

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Yeswiki

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Yeswiki

CVE-2026-104455

YesWiki before 4.6.7 Read-ACL Bypass via recentchangesrssplus RSS Action

YesWiki before 4.6.7 contains an access control bypass vulnerability that allows unauthenticated attackers to read restricted page content via the recentchangesrssplus RSS action. Attackers can request the xml method of a page hosting the action to retrieve 500-character body excerpts of every latest page, including read-restricted drafts and notes.

CVSS 4.0 · 6.9 Medium EPSS < 1% KEV · Not listed

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Yeswiki

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Yeswiki

CVE-2026-104451

YesWiki before 4.6.7 CSRF Page Revision Restore via RevisionsHandler

YesWiki before 4.6.7 contains a cross-site request forgery vulnerability in RevisionsHandler that allows attackers to restore old page revisions through GET requests lacking CSRF token validation. Attackers can lure write-capable users into a top-level navigation with the restoreRevisionId parameter, silently overwriting current page content with stale or vandalized revisions.

CVSS 4.0 · 5.3 Medium EPSS < 1% KEV · Not listed

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Yeswiki

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Yeswiki

CVE-2026-104447

YesWiki before 4.6.7 CSRF Package Deletion via autoupdate UpdateAction

YesWiki before 4.6.7 contains a cross-site request forgery vulnerability in the autoupdate UpdateAction that allows attackers to delete installed packages via unprotected GET requests. Attackers can lure a logged-in administrator to a crafted link with action=delete and a package parameter to remove extensions like bazar, breaking core site functionality.

CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed

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Yeswiki

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Yeswiki

CVE-2026-104443

YesWiki before 4.6.7 Scope Bypass via Triples Delete API

YesWiki before 4.6.7 contains an empty-filter scope bypass in the triples delete API that allows any authenticated user to delete or forge arbitrary semantic triples regardless of ownership. Attackers can send an empty filter to the triples delete endpoint to remove the admins-group membership triple, emptying the admin group and causing a site-wide authorization lockout.

CVSS 4.0 · 7.2 High EPSS < 1% KEV · Not listed

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Yeswiki

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Yeswiki

CVE-2026-104439

YesWiki before 4.6.7 User Enumeration via Lost-Password Flow

YesWiki before 4.6.7 contains a user enumeration vulnerability in LostPasswordAction.php that allows unauthenticated attackers to confirm registered email addresses through differing responses. Attackers can submit emails to the MotDePassePerdu recovery page without rate limiting to identify valid accounts for targeted phishing or password-spraying.

CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed

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Yeswiki

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Yeswiki

CVE-2026-104456

YesWiki before 4.6.7 Second-Order SQL Injection via ACL Username

YesWiki before 4.6.7 contains a second-order SQL injection vulnerability in AclService::updateRequestWithACL, where a stored username is concatenated unescaped into a read-ACL LIKE clause. Attackers can self-register an account name containing a double-quote payload, then load non-admin ACL-filtered listings to read database contents and bypass read ACLs.

CVSS 4.0 · 7.2 High EPSS < 1% KEV · Not listed

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Yeswiki

CVE-2026-104466

YesWiki before 4.6.7 Stored XSS via Wakka Markdown Image src Attribute

YesWiki before 4.6.7 contains a stored cross-site scripting vulnerability in formatters/wakka.php that allows users who can edit pages or post comments to inject event handlers by placing quotes in markdown image URLs. Attackers can store a crafted markdown image whose src breaks out of the attribute to add an onerror handler, executing JavaScript in viewers' browsers, including administrators.

CVSS 4.0 · 5.1 Medium EPSS < 1% KEV · Not listed

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Yeswiki

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Yeswiki

CVE-2026-104452

YesWiki before 4.6.7 CSRF Attachment Deletion via filemanager Handler

YesWiki before 4.6.7 contains a cross-site request forgery vulnerability in the filemanager page handler, which deletes page attachments on GET requests without validating a CSRF token. Attackers can lure a logged-in page owner or administrator into a top-level GET navigation with do=del, erase, or emptytrash, deleting or permanently purging the page's attachments.

CVSS 4.0 · 5.3 Medium EPSS < 1% KEV · Not listed

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Yeswiki

CVE-2026-52772

YesWiki: Bazar form-field templates still apply `|raw('html')` to `field.label` / `field.hint` in attribute and label-body contexts — stored XSS in form renders (sibling class of commit `e6b66aa`)

YesWiki is a wiki system written in PHP. Prior to version 4.6.6, Bazar form-field templates still apply |raw('html') to field.label / field.hint in attribute and label-body contexts, resulting stored XSS in form renders. This issue has been patched in version 4.6.6.

CVSS 3.1 · 5.5 Medium EPSS < 1% KEV · Not listed

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Yeswiki

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Yeswiki

CVE-2026-52766

YesWiki: Unauthenticated arbitrary page deletion via `{{erasespamedcomments}}` action

YesWiki is a wiki system written in PHP. Prior to version 4.6.6, the {{erasespamedcomments}} wiki action (actions/EraseSpamedCommentsAction.php) accepts a suppr[] array from POST and deletes every wiki page whose tag appears in that array, with no authorization check anywhere in the action body or in the page-deletion path it invokes. Combined with YesWiki's allow-by-default action ACL model, any user who has page write access, which is the default for everyone (default_write_acl='*') on a fresh install can permanently delete arbitrary wiki pages, including the front page, admin pages, and pages owned by other users. This issue has been patched in version 4.6.6.

CVSS 3.1 · 9.1 Critical EPSS < 1% KEV · Not listed

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Yeswiki

CVE-2026-52775

YesWiki Authenticated SQL Injection in ReactionManager

YesWiki is a wiki system written in PHP. Prior to version 4.6.6, YesWiki through the latest development branch contains a SQL injection vulnerability in ReactionManager::deleteUserReaction() that allows any authenticated user to inject arbitrary SQL via the {idreaction} and {id} URL path parameters. The parameters are concatenated directly into a SQL LIKE clause without escaping or parameterization. This issue has been patched in version 4.6.6.

CVSS 3.1 · 8.8 High EPSS < 1% KEV · Not listed

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Yeswiki

CVE-2026-52763

YesWiki: SQL injection via the `recentchanges` action `period` argument leading to arbitrary DB read

YesWiki is a wiki system written in PHP. Prior to version 4.6.6, the recentchanges action (actions/recentchanges.php) accepts a period argument from two disjoint parameter spaces. A whitelist validates only the URL form against ['day','week','month']. The action-argument form takes the else branch with no validation, and the value flows into PageManager::getRecentlyChanged(), where it is interpolated into a WHERE time >= '...' ORDER BY time DESC clause without escaping or parameterization. UNION-based injection succeeds, the leaked rows render into the response page, so any visitor of the trigger page sees the exfiltrated data. The vulnerability provides arbitrary read of the YesWiki database to anyone who can save the trigger page. On a default install (default_write_acl='*'), this includes anonymous users, subject to the hashcash JS check on the page-edit form. Once the trigger page is saved, every subsequent view fires the injection as the SQLi is stored. Stored SQL injection is reachable through the page-edit flow, with arbitrary database read. This issue has been patched in version 4.6.6.

CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed

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Yeswiki

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Yeswiki

CVE-2026-52771

YesWiki: Second-Order SQL Injection in Page Delete API via Unescaped Page Tag (`ApiController::deletePage`)

YesWiki is a wiki system written in PHP. From version 4.2.0 to before version 4.6.6, ApiController::deletePage() interpolates a page tag retrieved from the database into a DELETE FROM …_links WHERE to_tag = '$tag' query without escaping. The page tag is attacker-controlled — the POST /api/pages/{tag} API accepts arbitrary URL-encoded values, including single quotes, and stores them. A low-privilege authenticated user can therefore create a page whose tag is a SQL fragment, make the page non-orphaned via the standard {{include page="…"}} link mechanism, and then invoke the delete endpoint to execute arbitrary SQL inside the wiki database - including time-based blind data exfiltration from any table. This issue has been patched in version 4.6.6.

CVSS 3.1 · 8.3 High EPSS < 1% KEV · Not listed

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Yeswiki

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Yeswiki

CVE-2026-52770

Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') in yeswiki/yeswiki

YesWiki is a wiki system written in PHP. Prior to version 4.6.6, YesWiki’s public Bazar entry-listing APIs are vulnerable to unauthenticated SQL injection in numeric query / queries filters. For Bazar fields whose value structure is numeric, YesWiki escapes the attacker-controlled filter value but inserts it into SQL without quotes or numeric validation. An unauthenticated attacker can inject boolean SQL expressions and infer database contents from whether entries are returned. This issue has been patched in version 4.6.6.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed

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Yeswiki

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Yeswiki