CVE-2021-39316

ZoomSounds - WordPress Wave Audio Player with Playlist <= 6.45 - Directory Traversal

2021-08-30 00:00

Strategic Overview

Status: Patched in 6.50
Affected Plugin: ZoomSounds - WordPress Wave Audio Player with Playlist
Affected Version: <= 6.45
CVSS: 7.5High
Weakness type: CWE-22 · Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CVE: CVE-2021-39316

View all ZoomSounds - WordPress Wave Audio Player with Playlist vulnerabilities

At a glance

CVE-2021-39316 is a high-severity Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability in the ZoomSounds - WordPress Wave Audio Player with Playlist WordPress plugin, affecting versions <= 6.45. 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 6.50; sites on affected versions should update now. Disclosed August 2021, reported by DigitalJessica Ltd.

Vulnerability Overview

The Zoomsounds plugin <= 6.45 for WordPress allows arbitrary files, including sensitive configuration files such as wp-config.php, to be downloaded via the `dzsap_download` action using directory traversal in the `link` parameter.

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-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Reaching this weakness in ZoomSounds - WordPress Wave Audio Player with Playlist <= 6.45 takes a caller who can reach the endpoint. Path traversal happens when user-controlled text is used to build a filesystem path without being constrained to an intended directory, so sequences like ../ walk the resolved path somewhere else.

Depending on the operation, it means reading files outside the intended folder — wp-config.php being the usual target — or writing to and deleting paths the web server can touch. For ZoomSounds - WordPress Wave Audio Player with Playlist the fix is 6.50: builds <= 6.45 are affected, anything from 6.50 onward is not.

Remediation

Update to version 6.50, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to ZoomSounds - WordPress Wave Audio Player with Playlist: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: ZoomSounds - WordPress Wave Audio Player with Playlist 6.50 closes this, and updating the plugin is the step that ends it.

Firewall
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2021-39316 https://www.wordfence.com/threat-intel/vulnerabilities/id/cffeac2c-8ca3-44f7-b54c-3c23b7a849a3 https://nvd.nist.gov/vuln/detail/CVE-2021-39316

Related records

Other vulnerabilities in ZoomSounds - WordPress Wave Audio Player with Playlist

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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