Image Source Control Lite < 2.3.1 - Insecure Direct Object Reference
Strategic Overview
- Status
- Patched in 2.3.1
- Affected Plugin
- Image Source Control Lite – Show Image Credits and Captions
- Affected Version
< 2.3.1- CVSS
- 4.3Medium
- Weakness type
- CWE-639 · Authorization Bypass Through User-Controlled Key
- CVE
CVE-2021-24781
At a glance
CVE-2021-24781 is a medium-severity Authorization Bypass Through User-Controlled Key vulnerability in the Image Source Control Lite WordPress plugin, affecting versions < 2.3.1. It carries a CVSS score of 4.3 (reachable over the network; low attack complexity). The issue is fixed in version 2.3.1; sites on affected versions should update now. Disclosed October 2021, reported by apple502j.
Vulnerability Overview
The Image Source Control WordPress plugin before 2.3.1 allows users with a role as low as Contributor to change arbitrary post meta fields of arbitrary posts (even those they should not be able to edit).
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-639: Authorization Bypass Through User-Controlled Key
Reaching this weakness in Image Source Control Lite < 2.3.1 takes a caller who can reach the endpoint. Authorization bypass through a user-controlled key, often called insecure direct object reference, means the application looks up a record by an identifier from the request without checking that the caller owns it.
Changing a number in the request is enough to read or modify other users' records, which on commerce and membership sites means customer data. For Image Source Control Lite the fix is 2.3.1: builds < 2.3.1 are affected, anything from 2.3.1 onward is not.
Remediation
Update to version 2.3.1, 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: Image Source Control Lite 2.3.1 closes this, and updating the plugin is the step that ends it.
- Login Security
- Alerts
External References
Related records
Other vulnerabilities in Image Source Control Lite – Show Image Credits and Captions
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