Optimizing Matters Autoptimize Plugin up to 3.1.15.1 on WordPress Critical CSS Feature ao_ccss_enqueue cross site scripting

Summaryinfo

A vulnerability marked as problematic has been reported in Optimizing Matters Autoptimize Plugin up to 3.1.15.1. This affects the function ao_ccss_enqueue of the component Critical CSS Feature. The manipulation leads to cross site scripting. This vulnerability is referenced as CVE-2026-14995. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Optimizing Matters Autoptimize Plugin up to 3.1.15.1. This issue affects the function ao_ccss_enqueue of the component Critical CSS Feature. The manipulation with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. Impacted is integrity. The summary by CVE is:

The Autoptimize plugin for WordPress is vulnerable to Stored Cross-Site Scripting via REQUEST_URI Path in all versions up to, and including, 3.1.15.1 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. Exploitation requires the Critical CSS feature to be active with a valid API key configured, as this is the precondition for unauthenticated frontend requests to trigger queue entries via ao_ccss_enqueue().

It is possible to read the advisory at wordfence.com. The identification of this vulnerability is CVE-2026-14995 since 07/07/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• WordPress Plugin

Vendor

• Optimizing Matters

Name

• Autoptimize Plugin

Version

• 3.1.15.0
• 3.1.15.1

CPE 2.3info

• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Be aware that VulDB is the high quality source for vulnerability data.

Discussion