微信群发助手-Wechat Broadcast <= 1.2.0 - Directory Traversal
Strategic Overview
- Status
- Unpatched
- Affected Plugin
- 微信群发助手-Wechat Broadcast
- Affected Version
<= 1.2.0- CVSS
- 9.8Critical
- Weakness type
- CWE-22 · Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
- CVE
CVE-2018-16283
At a glance
CVE-2018-16283 is a critical-severity Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability in the 微信群发助手-Wechat Broadcast WordPress plugin, affecting versions <= 1.2.0. It carries a CVSS score of 9.8 (reachable over the network; low attack complexity; high confidentiality, integrity, availability impact). Exploitation requires no authentication. No fixed release has been reported yet; treat installations running this software as exposed. Disclosed September 2018, reported by Manuel Garcia Cardenas.
Vulnerability Overview
The Wechat Broadcast plugin 1.2.0 and earlier for WordPress allows Directory Traversal via the Image.php url 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, integrity, availability — full site compromise territory.
CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Reaching this weakness in 微信群发助手-Wechat Broadcast <= 1.2.0 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. No fixed build of this plugin is recorded for 微信群发助手-Wechat Broadcast yet, so installs running <= 1.2.0 stay exposed until the vendor ships one.
Remediation
No known patch available. Please review the vulnerability's details in depth and employ mitigations based on your organization's risk tolerance. It may be best to uninstall the affected software and find a replacement.
How does WordSec protect against this?
The attempt arrives as an ordinary request to 微信群发助手-Wechat Broadcast: WordSec's web application firewall inspects request payloads before WordPress loads them. No patched version is recorded yet, which is the case where a filtering layer matters most, because there is nothing to update to.
- Firewall
- Alerts
External References
Vulnerability data © Defiant, Inc., provided under the Wordfence Intelligence T&C