CVE-2026-34974

phpMyFAQ: SVG Sanitizer Bypass via HTML Entity Encoding leads to Stored XSS and Privilege Escalation

phpMyFAQ is an open source FAQ web application. Prior to version 4.1.1, the regex-based SVG sanitizer in phpMyFAQ (SvgSanitizer.php) can be bypassed using HTML entity encoding in javascript: URLs within SVG <a href> attributes. Any user with edit_faq permission can upload a malicious SVG that executes arbitrary JavaScript when viewed, enabling privilege escalation from editor to full admin takeover. This issue has been patched in version 4.1.1.

CVSS 3.1 · 5.4 Medium EPSS < 1% KEV · Not listed

Vendors

Phpmyfaq Thorsten

Products

Phpmyfaq Phpmyfaq

CVE-2026-57996

phpMyFAQ - Privilege Escalation via Missing SuperAdmin Guard in user/add Endpoint

phpMyFAQ before 4.1.5 contains a privilege escalation vulnerability in the user/add API endpoint that allows non-SuperAdmin administrators to create SuperAdmin accounts. A delegated administrator with USER_ADD/EDIT/DELETE permissions can call POST /admin/api/user/add with isSuperAdmin: true and attacker-chosen credentials to create a SuperAdmin account, then authenticate as that account to achieve full instance takeover.

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed

Vendors

Phpmyfaq

Products

Phpmyfaq

CVE-2026-57961

phpMyFAQ - Authenticated Path Traversal in PDF Export via concatenatePaths Function

phpMyFAQ before 4.1.5 contains a potential authenticated path traversal vulnerability in the concatenatePaths() function within src/phpMyFAQ/Export/Pdf/Wrapper.php. A user with FAQ editing privileges can store HTML containing crafted image paths that are processed during PDF generation. The path resolution logic locates the substring "content" within a user-controlled path using strpos(); when "content" is absent, strpos() returns false, which becomes 0 when cast to an integer, preserving the entire attacker-controlled path. This path is later passed to file_get_contents() without canonicalization or root-directory containment validation, which may allow reading of files outside the intended content directory.

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

Vendors

Phpmyfaq

Products

Phpmyfaq

CVE-2026-57994

phpMyFAQ - Information Disclosure of Inactive FAQ Content via Public API Endpoints

phpMyFAQ before 4.1.5 applies inconsistent active=yes and publication-date filtering across its public FAQ API endpoints, allowing unauthenticated attackers to retrieve inactive (draft or review-only) FAQ content. Specifically, GET /api/v3.1/faq/{categoryId}/{faqId} returns the inactive FAQ title and full answer, while GET /api/v3.1/faqs/tags/{tagId} and GET /api/v4.0/faqs/tags/{tagId} return the inactive FAQ title and answer preview, disclosing non-public content.

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

Vendors

Phpmyfaq

Products

Phpmyfaq

CVE-2026-57995

phpMyFAQ - Privilege Escalation via Missing Self-Rights Constraint in GroupController::updatePermissions

phpMyFAQ before 4.1.5 contains a privilege escalation vulnerability in GroupController::updatePermissions that allows GROUP_EDIT administrators to grant arbitrary rights to groups without verifying they hold those rights themselves. A delegated administrator can exploit this by assigning high-value permissions to a group they belong to, inheriting those rights and escalating privileges up to full administrative control.

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed

Vendors

Phpmyfaq

Products

Phpmyfaq

CVE-2026-56396

phpMyFAQ - Privilege Escalation via Missing Authorization in editUser() and updateUserRights()

phpMyFAQ before 4.1.4 contains missing authorization vulnerabilities in editUser() and updateUserRights() endpoints that allow authenticated administrators to escalate privileges. Non-SuperAdmin users with edit_user permission can set is_superadmin flag or grant arbitrary rights to escalate to SuperAdmin access.

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed

Vendors

Phpmyfaq

Products

Phpmyfaq

CVE-2023-4006

Improper Neutralization of Formula Elements in a CSV File in thorsten/phpmyfaq

Improper Neutralization of Formula Elements in a CSV File in GitHub repository thorsten/phpmyfaq prior to 3.1.16.

CVSS 3.1 · 9.8 Critical EPSS < 1% KEV · Not listed

Vendors

Phpmyfaq

Products

Phpmyfaq

CVE-2026-35671

phpMyFAQ - Insecure Direct Object Reference in User Password API

phpMyFAQ before 4.1.3 contains an insecure direct object reference vulnerability in the admin API user password endpoint that allows authenticated administrators to change any user's password without authorization verification. An attacker with low-privilege admin credentials can escalate to SuperAdmin by modifying the userId parameter in the overwrite-password API request.

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed

Vendors

Phpmyfaq

Products

Phpmyfaq

CVE-2026-35675

phpMyFAQ - Authentication Bypass via Missing Password Reset Token in /api/user/password/update

phpMyFAQ before 4.1.3 contains an authentication bypass vulnerability in the password reset endpoint that allows unauthenticated attackers to reset any user account password without token verification or email confirmation. Attackers can enumerate valid usernames, obtain plaintext passwords via email, and achieve complete account takeover including administrative access.

CVSS 4.0 · 8.8 High EPSS < 1% KEV · Not listed

Vendors

Phpmyfaq Thorsten

Products

Phpmyfaq Phpmyfaq

CVE-2026-35676

phpMyFAQ - Unauthenticated Password Reset via User Password Update Endpoint

phpMyFAQ before 4.1.3 contains an unauthenticated password reset vulnerability in the user password update API endpoint that allows attackers to change account passwords without token validation. Attackers can enumerate valid username and email pairs and force immediate password changes by sending PUT requests to the /api/index.php/user/password/update endpoint, causing account disruption and invalidating legitimate user credentials.

CVSS 4.0 · 8.8 High EPSS < 1% KEV · Not listed

Vendors

Phpmyfaq Thorsten

Products

Phpmyfaq Phpmyfaq

CVE-2026-35672

phpMyFAQ - Authentication Bypass via Empty API Token

phpMyFAQ before 4.1.3 contains an authentication bypass vulnerability in API v4.0 where the default empty api.apiClientToken allows unauthenticated users to create and modify FAQ entries. Attackers can send an empty x-pmf-token header to bypass token validation and inject malicious content via POST endpoints /api/v4.0/faq/create, /api/v4.0/category, and /api/v4.0/question.

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed

Vendors

Phpmyfaq

Products

Phpmyfaq

CVE-2026-46367

phpMyFAQ - Stored XSS via Utils::parseUrl() in Comment Rendering

phpMyFAQ before 4.1.2 contains a stored cross-site scripting vulnerability in Utils::parseUrl() that allows authenticated users to inject JavaScript via malformed URLs in comments. Attackers can craft URLs with unescaped quotes to inject event handlers, stealing admin session cookies and achieving full application takeover when visitors view affected FAQ pages.

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

Vendors

Phpmyfaq Thorsten

Products

Phpmyfaq Phpmyfaq

CVE-2026-46366

phpMyFAQ - Unauthenticated Information Disclosure via getIdFromSolutionId Permission Bypass

phpMyFAQ before 4.1.2 contains an information disclosure vulnerability in the getIdFromSolutionId() method that lacks permission filtering, allowing unauthenticated attackers to enumerate restricted FAQ entries and read their titles via the /solution_id_{id}.html endpoint. Attackers can sequentially iterate solution IDs to discover all FAQs including those restricted to specific users or groups, leaking sensitive metadata through redirect Location headers and page canonical links.

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed

Vendors

Phpmyfaq Thorsten

Products

Phpmyfaq Phpmyfaq

CVE-2026-46365

phpMyFAQ - Missing Authorization in Tag Deletion Endpoint

phpMyFAQ before 4.1.2 contains a missing authorization vulnerability in the DELETE /admin/api/content/tags/{tagId} endpoint that allows any authenticated user to delete tags. Any logged-in user, including regular frontend users, can delete arbitrary tags by sending a DELETE request with a valid session cookie, resulting in permanent data loss and disruption of FAQ organization.

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

Vendors

Phpmyfaq Thorsten

Products

Phpmyfaq Phpmyfaq

CVE-2026-46364

phpMyFAQ - SQL Injection via User-Agent Header in BuiltinCaptcha

phpMyFAQ before 4.1.2 contains an unauthenticated SQL injection vulnerability in BuiltinCaptcha::garbageCollector() and BuiltinCaptcha::saveCaptcha() methods that interpolate unsanitized User-Agent headers into DELETE and INSERT queries. Unauthenticated attackers can exploit the public GET /api/captcha endpoint by crafting malicious User-Agent headers to perform time-based blind SQL injection, extracting sensitive data including user credentials, admin tokens, and SMTP credentials from the database.

CVSS 4.0 · 9.3 Critical EPSS 1.7% KEV · Not listed

Vendors

Phpmyfaq Thorsten

Products

Phpmyfaq Phpmyfaq

CVE-2026-46363

phpMyFAQ - Stored XSS in FAQ Question/Answer via Encode-Decode Bypass

phpMyFAQ before 4.1.2 contains a stored cross-site scripting vulnerability in FAQ creation and update endpoints that bypass sanitization through encode-decode cycles. The vulnerability allows authenticated attackers with FAQ_ADD permission to inject malicious script tags via question or answer parameters, which execute in every visitor's browser when FAQ content is rendered with the raw Twig filter.

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

Vendors

Phpmyfaq Thorsten

Products

Phpmyfaq Phpmyfaq

CVE-2026-46362

phpMyFAQ - Authorization Bypass in Admin Pages via Non-Terminating Permission Check

phpMyFAQ before 4.1.2 contains an authorization bypass vulnerability in AbstractAdministrationController::userHasPermission() that fails to terminate execution after sending a forbidden response. Attackers can access all permission-protected admin pages by requesting their URLs as authenticated users, exposing admin logs, user data, system information, and application configuration.

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

Vendors

Phpmyfaq Thorsten

Products

Phpmyfaq Phpmyfaq

CVE-2026-46361

phpMyFAQ - Stored Cross-Site Scripting via raw Filter in search.twig

phpMyFAQ before 4.1.2 contains a stored cross-site scripting vulnerability in search.twig where result.question and result.answerPreview are rendered with the raw filter, disabling autoescape protection. Attackers with FAQ editor privileges can inject HTML-entity-encoded payloads that bypass html_entity_decode(strip_tags()) processing in SearchController.php, executing arbitrary JavaScript in every visitor's browser context including administrators.

CVSS 4.0 · 8.2 High EPSS < 1% KEV · Not listed

Vendors

Phpmyfaq Thorsten

Products

Phpmyfaq Phpmyfaq

CVE-2026-46360

phpMyFAQ - Stored XSS via Entity Decoding Depth Limit Bypass in SVG Sanitizer

phpMyFAQ before 4.1.2 contains a stored cross-site scripting vulnerability in SvgSanitizer::decodeAllEntities() that limits recursive entity decoding to 5 iterations, allowing attackers to bypass sanitization. Authenticated users with FAQ_EDIT permission can upload malicious SVG files with deeply nested ampersand encoding around numeric HTML entities to reconstruct javascript: URLs, which execute arbitrary JavaScript when clicked by other users viewing the uploaded SVG.

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

Vendors

Phpmyfaq Thorsten

Products

Phpmyfaq Phpmyfaq

CVE-2026-46359

phpMyFAQ - SQL Injection in CurrentUser::setTokenData via Unescaped OAuth Token Fields

phpMyFAQ before 4.1.2 contains a sql injection vulnerability in CurrentUser::setTokenData that allows authenticated attackers to execute arbitrary SQL by injecting malicious OAuth token claims. Attackers with Azure AD accounts containing SQL metacharacters in display names or JWT claims can break out of string literals and execute arbitrary database queries.

CVSS 4.0 · 7.7 High EPSS < 1% KEV · Not listed

Vendors

Phpmyfaq Thorsten

Products

Phpmyfaq Phpmyfaq