Server-side Request Forgery (SSRF)

Overview Affected versions of this package are vulnerable to Server-side Request Forgery SSRF via the verifySignature process. An attacker can cause the server to initiate arbitrary outbound HTTP requests to internal or external hosts by supplying a crafted Signature.keyId header, potentially...

Improper Verification of Cryptographic Signature

Overview Affected versions of this package are vulnerable to Improper Verification of Cryptographic Signature in the verifySignature process due to improper verification of cryptographic signatures when handling the return value of opensslverify. An attacker can gain unauthorized access and perfo...

GHSA-MV28-WJ57-F57G YesWiki Vulnerable to Unauthenticated ActivityPub Signature-Verification Bypass via `!openssl_verify(...)` accepting `int(-1)`

Summary 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: | return | meaning | !return | | ------ | ------------------------------------------------ |...

Missing Authorization

Overview Affected versions of this package are vulnerable to Missing Authorization in the erasespamedcomments process. An attacker can permanently delete arbitrary wiki pages, including critical or administrative pages, by sending crafted POST requests containing a suppr array with targeted page...

GHSA-6X7X-GCMF-7R8X YesWiki vulnerable to unauthenticated arbitrary page deletion via `{{erasespamedcomments}}` action

Summary 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...

Improper Validation of Specified Type of Input

Overview Affected versions of this package are vulnerable to Improper Validation of Specified Type of Input via the period parameter in the recentchanges action when user input is not properly validated before being interpolated into a SQL query. An attacker can access arbitrary database content ...

GHSA-89V6-J5X6-CMJ3 YesWiki: SQL injection via the `recentchanges` action `period` argument leads to arbitrary DB read

Summary The recentchanges action actions/recentchanges.php accepts a period argument from two disjoint parameter spaces: the URL query string $GET'period' and the action invocation recentchanges period="...". A whitelist at line 17 validates only the URL form against 'day','week','month'. The...

YesWiki: Authenticated (Admin) Server-Side Template Injection to Remote Code Execution via Bazar Semantic Templates

Summary 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 expressions into the Semantic template Twig field...

Improper Neutralization of Special Elements Used in a Template Engine

Overview Affected versions of this package are vulnerable to Improper Neutralization of Special Elements Used in a Template Engine in the renderFromStringNoEscape process. An attacker can execute arbitrary code on the server by injecting malicious Twig expressions into the semantic template field...

GHSA-65P8-9433-JPCP YesWiki: Authenticated (Admin) Server-Side Template Injection to Remote Code Execution via Bazar Semantic Templates

Summary 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 expressions into the Semantic template Twig field...

PT-2026-57026

Name of the Vulnerable Software and Affected Versions YesWiki versions prior to 4.6.6 Description A stored SQL injection exists in the recentchanges action via the actions/recentchanges.php endpoint. The system accepts a period argument from two different parameter sources. While the URL form is...

PT-2026-57030

Name of the Vulnerable Software and Affected Versions YesWiki versions prior to 4.6.6 Description YesWiki's public Bazar entry-listing APIs are subject to unauthenticated SQL injection. The issue occurs when the system processes numeric query filters; while the system escapes the filter value, it...

PT-2026-57025

Name of the Vulnerable Software and Affected Versions YesWiki versions prior to 4.6.6 Description YesWiki Bazar contains a stored Server-Side Template Injection SSTI in the semantic template feature. SSTI occurs when an application embeds user-supplied input into a server-side template without...

PT-2026-57027

Name of the Vulnerable Software and Affected Versions YesWiki versions prior to 4.6.6 Description An issue exists in the erasespamedcomments wiki action, located in actions/EraseSpamedCommentsAction.php, which allows unauthenticated users to permanently delete arbitrary wiki pages. The action...

PT-2026-57033

Name of the Vulnerable Software and Affected Versions YesWiki versions 4.1.0 through 4.6.5 Description YesWiki contains a reflected Cross-site Scripting XSS issue in the archived-revision view. The application reflects the time GET parameter into a hidden HTML input within the...

PT-2026-57035

Name of the Vulnerable Software and Affected Versions YesWiki versions prior to 4.6.6 Description An issue exists in the ReactionManager::deleteUserReaction function where authenticated users can perform a SQL injection. This occurs because the idreaction and id URL path parameters are concatenat...

CVE-2026-52778

YesWiki is a wiki system written in PHP. Prior to version 4.6.6, an unsafe execution vulnerability exists in the Bazar form field calculator CalcField.php of YesWiki. The application attempts to sanitize user-defined mathematical formulas using a complex recursive regular expression before passin...

Arbitrary Code Injection

Overview Affected versions of this package are vulnerable to Arbitrary Code Injection via the CalcField.php process. An attacker can execute arbitrary PHP code or cause a server crash by submitting specially crafted input that bypasses sanitization and is processed by the eval function. Remediati...

CVE-2026-52778

YesWiki is a wiki system written in PHP. Prior to version 4.6.6, an unsafe execution vulnerability exists in the Bazar form field calculator CalcField.php of YesWiki. The application attempts to sanitize user-defined mathematical formulas using a complex recursive regular expression before passin...

CVE-2026-52778 YesWiki has Unsafe eval() in Formula Calculator - Remote Code Execution (RCE) & Denial of Service (DoS)

YesWiki is a wiki system written in PHP. Prior to version 4.6.6, an unsafe execution vulnerability exists in the Bazar form field calculator CalcField.php of YesWiki. The application attempts to sanitize user-defined mathematical formulas using a complex recursive regular expression before passin...