Slideshow, Image Slider by 2J <= 1.3.31 - Authorization Bypass
Strategic Overview
- Status
- Patched in 1.3.33
- Affected Plugin
- Slideshow, Image Slider by 2J
- Affected Version
<= 1.3.31- CVSS
- 5.4Medium
- Weakness type
- CWE-285 · Improper Authorization
- CVE
CVE-2020-36729
At a glance
CVE-2020-36729 is a medium-severity Improper Authorization vulnerability in the Slideshow, Image Slider by 2J WordPress plugin, affecting versions <= 1.3.31. It carries a CVSS score of 5.4 (reachable over the network; low attack complexity). The issue is fixed in version 1.3.33; sites on affected versions should update now. Disclosed January 2020, reported by Jerome Bruandet.
Vulnerability Overview
The 2J-SlideShow Plugin for WordPress is vulnerable to authorization bypass due to a missing capability check on the 'twoj_slideshow_setup' function called via the wp_ajax_twoj_slideshow_setup AJAX action in versions up to, and including, 1.3.31. This makes it possible for authenticated attackers (Subscriber, or above level access) to allow attackers to perform otherwise restricted actions and subsequently deactivate any plugins on the blog.
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 interaction from a victim user.
CWE-285: Improper Authorization
Slideshow, Image Slider by 2J <= 1.3.31 carries this weakness at twoj_slideshow_setup, and reaching it takes a caller who can reach the endpoint. Improper authorization means a permission check exists but does not cover the case being exercised, so a caller who is allowed to do one thing is allowed to do a neighbouring thing as well.
A lower-privileged account performs an action reserved for a higher one, which on a multi-author or membership site means an ordinary user reaching administrative behaviour. For Slideshow, Image Slider by 2J the fix is 1.3.33: builds <= 1.3.31 are affected, anything from 1.3.33 onward is not.
Remediation
Update to version 1.3.33, or a newer patched version
How does WordSec protect against this?
Because it turns on account access, WordSec's login security is the relevant layer: role-based two-factor, captcha and brute-force limits raise the cost of getting the account this needs. None of that substitutes for the fix: Slideshow, Image Slider by 2J 1.3.33 closes this, and updating the plugin is the step that ends it.
- Login Security
- Alerts
External References
Related records
Other vulnerabilities in Slideshow, Image Slider by 2J
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