PT-2026-104255

YesWiki before 4.6.7 contains an authentication bypass vulnerability in the ActivityPub inbox that fails to bind the verified HTTP signature signer to the activity actor. Unauthenticated attackers with any ActivityPub keypair can send signed Delete or Update activities referencing a mirrored...

PT-2026-104283

YesWiki before 4.5.3 contains multiple reflected cross-site scripting vulnerabilities that allow remote attackers to inject JavaScript through unsanitized parameters such as incomingurl, id, file, tags, and template. Attackers can lure authenticated or unauthenticated users into opening crafted...

PT-2026-104282

YesWiki before 4.6.7 contains a missing authorization vulnerability in the attachment download handler that allows unauthenticated attackers to bypass page read ACLs. Attackers can request the download handler with a known page tag and file parameter to retrieve confidential attachments from...

CVE-2026-104471: Unrestricted Upload of File with Dangerous Type

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...

PT-2026-104267

Name of the Vulnerable Software and Affected Versions YesWiki versions prior to 4.6.7 Description An SQL injection issue exists in the Bazar filtertags action. The system wraps unescaped filterN attribute tokens in quotes and concatenates them into a raw tags.value IN ... clause. Unauthenticated...

YesWiki <= 4.5.1 - Cross-Site Scripting

YesWiki alertdocument.domain","YesWiki"' - 'statuscode == 200' - 'containscontenttype, "text/html"' condition: and digest: 4a0a0047304502210081b115925fd1dd310b011e8634d8ee40cc42ef1bc9c58737508b82373dc9d395022038cb61d194605963a625a0526e24002c5e2c3366c0f76534d62248af1c47c093:922c6459022...

CVE-2026-52777

YesWiki is a wiki system written in PHP. Prior to version 4.6.6, there is an authenticated PHP object injection vulnerability in BazarImportAction via unserialize. This issue has been patched in version 4.6.6...

CVE-2026-52773

YesWiki is a wiki system written in PHP. From version 4.1.0 to before version 4.6.6, YesWiki's archived-revision view reflects the time GET parameter into a hidden HTML input in handlers/page/show.php without escaping. Because MySQL coerces malformed DATETIME strings, an attacker can append HTML ...

CVE-2026-52772

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...

CVE-2026-52774

YesWiki is a wiki system written in PHP. Prior to version 4.6.6, YesWiki's Bazar widget handler reflects the id GET parameter into HTML attributes using striptags only. Because striptags does not escape double quotes, an attacker can break out of the attribute value, inject an event handler such ...

CVE-2026-52775

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. Th...

CVE-2026-52771

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 totag = '$tag' query without escaping. The page tag is attacker-controlled — the POST /api/pages/tag A...

CVE-2026-52770

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 bu...

CVE-2026-52763

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 wi...

CVE-2026-52767

YesWiki is a wiki system written in PHP. From version 4.6.2 to before version 4.6.6, HttpSignatureService::verifySignature checks the result of PHP's opensslverify with a loose boolean negation - if !opensslverify... throw ... . PHP's opensslverify has four possible return values: 1, 0, -1, and...

CVE-2026-52769

YesWiki is a wiki system written in PHP. From version 4.6.2 to before version 4.6.6, the POST /api/forms/formId/actor/inbox route - exposed publicly with acl:"public" - accepts an HTTP Signature header whose keyId parameter is a URL. HttpSignatureService::verifySignature parses the header and...

CVE-2026-52766

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...

CVE-2026-52762

YesWiki is a wiki system written in PHP. Prior to version 4.6.6, YesWiki Bazar contains a stored Server-Side Template Injection SSTI vulnerability in the semantic template feature that can be escalated to confirmed Remote Code Execution RCE. An authenticated administrator can place arbitrary Twig...

CVE-2026-52771: Improper Neutralization of Special Elements used in an SQL Command

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 totag = '$tag' query without escaping. The page tag is attacker-controlled — the POST /api/pages/tag A...

CVE-2026-52772: Improper Neutralization of Input During Web Page Generation

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...