CVE-2025-31066: Acerola Auth Bypass Vulnerability

CVE-2025-31066 Overview

CVE-2025-31066 is a missing authorization vulnerability in the Themeton Acerola WordPress theme. The flaw affects all versions of Acerola up to and including 1.6.5. Attackers can exploit incorrectly configured access control security levels to reach functionality that should require higher privileges. The vulnerability is classified under [CWE-862] (Missing Authorization) and is exploitable over the network without authentication or user interaction. Successful exploitation results in limited integrity impact against affected WordPress installations. The issue was published to the National Vulnerability Database (NVD) on May 16, 2025, and tracked through Patchstack's WordPress vulnerability database.

Critical Impact
Unauthenticated attackers can reach protected functionality in the Acerola theme due to missing authorization checks, leading to limited integrity compromise of the WordPress site.

Affected Products

Themeton Acerola WordPress theme versions up to and including 1.6.5
WordPress sites using the Acerola theme with default access control configuration
All Acerola deployments prior to a patched release

Discovery Timeline

2025-05-16 - CVE-2025-31066 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-31066

Vulnerability Analysis

The Acerola theme exposes functionality without verifying that the requester holds the required privileges. Missing authorization vulnerabilities [CWE-862] occur when application code performs sensitive actions without validating the caller's role or capability. In WordPress themes, this pattern typically appears in AJAX handlers, admin-post endpoints, or REST API routes that omit current_user_can() or nonce validation.

The vulnerability is reachable over the network with low attack complexity. Attackers do not need credentials or user interaction to trigger the flawed code path. The impact is limited to integrity, meaning attackers can modify data or trigger actions but cannot directly read confidential data or cause denial of service through this specific issue.

Root Cause

The root cause is incorrectly configured access control security levels within the Acerola theme codebase. Endpoints or hooks in the theme fail to enforce authorization checks before executing privileged operations. Any exposed callback that modifies theme options, posts, or configuration without capability checks becomes an attack surface.

Attack Vector

Attackers send crafted HTTP requests to the vulnerable WordPress endpoint exposed by the Acerola theme. Because no authentication is required, exploitation is possible against any internet-facing site running an affected version. Details are documented in the Patchstack WordPress Vulnerability Report. No verified public proof-of-concept code is currently available.

Detection Methods for CVE-2025-31066

Indicators of Compromise

Unexpected modifications to WordPress theme options or site configuration without corresponding administrator login events
HTTP POST requests to admin-ajax.php or theme-specific endpoints from unauthenticated sessions
Anomalous requests targeting Acerola theme paths under /wp-content/themes/acerola/

Detection Strategies

Inventory WordPress installations and identify sites running the Acerola theme at version 1.6.5 or earlier
Review web server access logs for requests to Acerola theme endpoints originating from unauthenticated clients
Correlate WordPress audit logs with HTTP traffic to detect privileged actions without a preceding authentication event

Monitoring Recommendations

Enable WordPress activity logging plugins to capture option changes and administrative actions
Deploy a web application firewall (WAF) with rules covering broken access control patterns on WordPress themes
Monitor file integrity of theme directories and wp_options records for unauthorized modifications

How to Mitigate CVE-2025-31066

Immediate Actions Required

Identify all WordPress sites running Themeton Acerola version 1.6.5 or earlier
Restrict access to the WordPress admin and AJAX endpoints via IP allow-lists where feasible
Deploy WAF rules that block unauthenticated requests to Acerola theme handlers
Review recent site changes for unauthorized modifications and revert as needed

Patch Information

No fixed version is listed in the NVD record at the time of publication. Site owners should consult the Patchstack WordPress Vulnerability Report and the vendor for the current status of a security release. Apply any vendor-supplied update immediately upon availability.

Workarounds

Switch to an alternative maintained WordPress theme until a patched Acerola release is available
Use Patchstack or an equivalent virtual patching service to block exploitation attempts against the vulnerable endpoints
Restrict access to WordPress administrative and AJAX interfaces at the reverse proxy or WAF layer

bash

# Example WAF rule concept: block unauthenticated POST to Acerola theme AJAX actions
# ModSecurity-style pseudocode
SecRule REQUEST_URI "@contains /wp-admin/admin-ajax.php" \
  "chain,deny,status:403,id:1003106,msg:'Block unauth Acerola action'"
  SecRule ARGS:action "@rx ^(acerola_)" \
    "chain"
    SecRule &REQUEST_COOKIES:/wordpress_logged_in_/ "@eq 0"