Single Post Exporter <= 1.1.1 - Cross-Site Request Forgery
Strategic Overview
- Status
- Unpatched
- Affected Plugin
- Single Post Exporter
- Affected Version
<= 1.1.1- CVSS
- 4.3Medium
- Weakness type
- CWE-352 · Cross-Site Request Forgery (CSRF)
- CVE
CVE-2021-24780
At a glance
CVE-2021-24780 is a medium-severity Cross-Site Request Forgery (CSRF) vulnerability in the Single Post Exporter WordPress plugin, affecting versions <= 1.1.1. It carries a CVSS score of 4.3 (reachable over the network; low attack complexity). Exploitation requires no authentication. No fixed release has been reported yet; treat installations running this software as exposed. Disclosed November 2021, reported by Francesco Carlucci.
Vulnerability Overview
The Single Post Exporter WordPress plugin through 1.1.1 does not have CSRF checks when saving its settings, which could allow attackers to make a logged in admin change them via a CSRF attack and give access to the export feature to any role such as subscriber. Subscriber users would then be able to export an arbitrary post/page (such as private and password protected) via a direct URL.
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.
CWE-352: Cross-Site Request Forgery (CSRF)
Reaching this weakness in Single Post Exporter <= 1.1.1 takes a caller who can reach the endpoint. Cross-site request forgery abuses the fact that browsers attach a victim's cookies to any request, so a state-changing action that only checks who you are, not whether you meant to act, can be triggered from another site.
An attacker who gets a logged-in user to load a crafted page can perform that action as them, with the impact scaling to whatever the victim's role is allowed to do. No fixed build of this plugin is recorded for Single Post Exporter yet, so installs running <= 1.1.1 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 Single Post Exporter: 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