CVE-2019-6715

W3 Total Cache 0.9.2.6-0.9.3 - File Read / Directory Traversal

2020-12-22 00:00

Strategic Overview

Status: Patched in 0.9.4
Affected Plugin: W3 Total Cache
Affected Version: 0.9.2.6 – 0.9.3
CVSS: 7.5High
Weakness type: CWE-200 · Exposure of Sensitive Information to an Unauthorized Actor
CVE: CVE-2019-6715

At a glance

CVE-2019-6715 is a high-severity Exposure of Sensitive Information to an Unauthorized Actor vulnerability in the W3 Total Cache WordPress plugin, affecting versions 0.9.2.6 – 0.9.3. It carries a CVSS score of 7.5 (reachable over the network; low attack complexity; high confidentiality impact). Exploitation requires no authentication. The issue is fixed in version 0.9.4; sites on affected versions should update now. Disclosed December 2020.

Vulnerability Overview

The script pub/sns.php in the W3 Total Cache plugin (versions 0.9.2.6 through 0.9.3) allows remote attackers to read arbitrary files via the SubscribeURL field in SubscriptionConfirmation JSON data.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no privileges on the target site, and no interaction from a victim user. A successful exploit has high impact on confidentiality.

CWE-200: Exposure of Sensitive Information to an Unauthorized Actor

Reaching this weakness in W3 Total Cache 0.9.2.6 – 0.9.3 takes a caller who can reach the endpoint. Sensitive information exposure means data the application intended to keep internal is returned to a caller who should not be able to see it.

The disclosed data — credentials, tokens, customer records or internal paths — is usually worth more as material for a follow-up attack than as an end in itself. For W3 Total Cache the fix is 0.9.4: builds 0.9.2.6 – 0.9.3 are affected, anything from 0.9.4 onward is not.

Remediation

Update to version 0.9.4, or a newer patched version

How does WordSec protect against this?

The fix is the thing that ends this: W3 Total Cache 0.9.4 closes this, and updating the plugin is the step that ends it.

Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2019-6715 https://www.wordfence.com/threat-intel/vulnerabilities/id/4b34dd60-359c-44a0-9e47-dc8c4e66b50e https://nvd.nist.gov/vuln/detail/CVE-2019-6715

Related records

Same weakness class

Other vulnerabilities in W3 Total Cache

CVSS Vector

7.5

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

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityNone
AvailabilityNone

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