CVE-2026-57776: VW Wedding Auth Bypass Vulnerability

CVE-2026-57776 Overview

CVE-2026-57776 is a missing authorization vulnerability in the vowelweb VW Wedding WordPress theme. The flaw affects all versions of vw-wedding up to and including 1.3.7. Attackers can exploit incorrectly configured access control security levels to reach functionality that should be restricted. The weakness is categorized under [CWE-862] Missing Authorization.

The vulnerability is network-exploitable without authentication or user interaction. Successful exploitation impacts availability of the affected WordPress site. Patchstack published the advisory documenting the broken access control condition in the theme.

Critical Impact
Unauthenticated remote attackers can invoke theme functionality lacking proper authorization checks, leading to low-impact availability degradation on affected WordPress sites.

Affected Products

vowelweb VW Wedding (vw-wedding) WordPress theme versions through 1.3.7
WordPress installations using the vulnerable theme
Sites with the theme enabled and accessible over the network

Discovery Timeline

2026-07-13 - CVE-2026-57776 published to NVD
2026-07-13 - Last updated in NVD database

Technical Details for CVE-2026-57776

Vulnerability Analysis

The VW Wedding theme exposes functionality without enforcing appropriate authorization checks. Under [CWE-862], the application fails to verify that a requester holds the required privileges before executing a sensitive action. Attackers reach the vulnerable endpoint over the network, submit crafted requests, and trigger behavior that should require an authenticated privileged session.

Because no authentication or user interaction is required, exploitation is straightforward. The scope remains unchanged, and confidentiality and integrity are not directly affected. Availability, however, can be degraded through the exposed functionality. The EPSS probability is 0.293% at the 21.356 percentile as of 2026-07-20, indicating low near-term exploitation likelihood but a non-trivial attack surface for any exposed WordPress site running the theme.

Root Cause

The root cause is the absence of capability or nonce checks on one or more theme handlers. WordPress themes commonly register AJAX or admin-post actions that must call current_user_can() and check_ajax_referer() before performing state-changing operations. When these checks are missing, any unauthenticated client can invoke the handler.

Attack Vector

An attacker sends HTTP requests directly to the vulnerable theme endpoint. No credentials, tokens, or social engineering are required. The request triggers the unprotected function path, causing the availability impact described in the advisory.

No public proof-of-concept exploit code is available. See the Patchstack Vulnerability Report for advisory details.

Detection Methods for CVE-2026-57776

Indicators of Compromise

Unauthenticated POST or GET requests to wp-admin/admin-ajax.php referencing VW Wedding theme actions
Requests to theme handler URIs under /wp-content/themes/vw-wedding/ from unexpected source IPs
Sudden availability degradation or unexpected content changes on sites running vw-wedding versions <= 1.3.7

Detection Strategies

Inventory WordPress deployments and identify sites running the vw-wedding theme at version 1.3.7 or earlier
Review web server access logs for repeated calls to theme-specific AJAX actions from unauthenticated sessions
Deploy WordPress security plugins that flag missing capability checks and anomalous admin-ajax activity

Monitoring Recommendations

Alert on high-volume requests to admin-ajax.php lacking valid WordPress authentication cookies
Monitor theme file integrity and configuration changes on affected installations
Track HTTP response codes and latency to detect availability impact from repeated exploit attempts

How to Mitigate CVE-2026-57776

Immediate Actions Required

Identify every WordPress site running the VW Wedding theme at version 1.3.7 or earlier
Deactivate the theme where a patched release is not yet available and switch to a supported alternative
Restrict access to wp-admin/admin-ajax.php at the web application firewall for unauthenticated action names tied to the theme

Patch Information

No fixed version is listed in the enriched data at the time of publication. Review the Patchstack Vulnerability Report for the current remediation status and any vendor-supplied update.

Workarounds

Disable the vw-wedding theme until a patched version is confirmed available
Block external requests to theme-specific AJAX action names using WAF rules
Enforce authentication on admin-ajax.php endpoints through virtual patching where feasible

bash

# Example WAF rule concept - block unauthenticated admin-ajax calls to vw-wedding actions
# Adapt to your WAF syntax (ModSecurity example)
SecRule REQUEST_URI "@contains /wp-admin/admin-ajax.php" \
    "chain,deny,status:403,id:1057776,msg:'Block CVE-2026-57776 vw-wedding unauth action'"
    SecRule ARGS:action "@rx ^(vw_wedding_|vwwedding_)" \
        "chain"
        SecRule &REQUEST_COOKIES:/wordpress_logged_in_/ "@eq 0"