boldgrid W3 Total Cache Plugin up to 2.9.3 on WordPress information disclosure

Summaryinfo

A vulnerability, which was classified as problematic, has been found in boldgrid W3 Total Cache Plugin up to 2.9.3 on WordPress. This issue affects some unknown processing. Performing a manipulation results in information disclosure. This vulnerability is identified as CVE-2026-5032. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in boldgrid W3 Total Cache Plugin up to 2.9.3 on WordPress. It has been classified as problematic. This affects an unknown functionality. The manipulation with an unknown input leads to a information disclosure vulnerability. CWE is classifying the issue as CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. This is going to have an impact on confidentiality. The summary by CVE is:

The W3 Total Cache plugin for WordPress is vulnerable to information exposure in all versions up to, and including, 2.9.3. This is due to the plugin bypassing its entire output buffering and processing pipeline when the request's User-Agent header contains "W3 Total Cache", which causes raw mfunc/mclude dynamic fragment HTML comments — including the W3TC_DYNAMIC_SECURITY security token — to be rendered in the page source. This makes it possible for unauthenticated attackers to discover the value of the W3TC_DYNAMIC_SECURITY constant by sending a crafted User-Agent header to any page that contains developer-placed dynamic fragment tags, granted the site has the fragment caching feature enabled.

The weakness was released by wesley. It is possible to read the advisory at wordfence.com. This vulnerability is uniquely identified as CVE-2026-5032 since 03/27/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 04/02/2026). The attack technique deployed by this issue is T1592 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

• boldgrid

Name

• W3 Total Cache Plugin

Version

• 2.9.0
• 2.9.1
• 2.9.2
• 2.9.3

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