CVE-2026-5032Network attack vector

Unauthenticated token disclosure via output-buffer bypass

Published Apr 2, 2026 · Updated Apr 2, 2026

Information exposure in BoldGrid W3 Total Cache 2.9.3 and earlier allows remote attackers to obtain a dynamic-fragment security token. When a User-Agent contains "W3 Total Cache", Generic_Plugin.php skips the output-buffering pipeline and returns raw mfunc or mclude comments containing W3TC_DYNAMIC_SECURITY. Fragment caching and developer-placed dynamic tags must be enabled and present; the disclosed token can authorize crafted mfunc tags that execute PHP code.

CVSS severity7.5
High
EPSS probability3.06%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information exposure in BoldGrid W3 Total Cache 2.9.3 and earlier allows remote attackers to obtain a dynamic-fragment security token. When a User-Agent contains "W3 Total Cache", Generic_Plugin.php skips the output-buffering pipeline and returns raw mfunc or mclude comments containing W3TC_DYNAMIC_SECURITY. Fragment caching and developer-placed dynamic tags must be enabled and present; the disclosed token can authorize crafted mfunc tags that execute PHP code.

The record

CVE
CVE-2026-5032
Published
Apr 2, 2026
Updated
Apr 2, 2026
Vendor
Web Ventures
Product
W3 Total Cache
Classifications
CWE-200, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 2, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 2, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=2.9.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Web Ventures · W3 Total Cacheversion=0 <=2.9.3

Published CVSS scores

7.5WordfenceCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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