CVE-2023-50898

Sirv <= 7.1.2 - Missing Authorization via sirv_disconnect

2023-12-26 00:00
Abdi Pranata

Strategic Overview

Status
Patched in 7.1.3
Affected Plugin
Image Optimizer, Resizer and CDN – Sirv
Affected Version
<= 7.1.2
CVSS
4.3Medium
Weakness type
CWE-862 · Missing Authorization
CVE
CVE-2023-50898
View all Image Optimizer, Resizer and CDN – Sirv vulnerabilities

At a glance

CVE-2023-50898 is a medium-severity Missing Authorization vulnerability in the Image Optimizer, Resizer and CDN WordPress plugin, affecting versions <= 7.1.2. It carries a CVSS score of 4.3 (reachable over the network; low attack complexity). The root cause is a missing authorization check on a reachable function. The issue is fixed in version 7.1.3; sites on affected versions should update now. Disclosed December 2023, reported by Abdi Pranata.

Vulnerability Overview

The Sirv plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the sirv_disconnect function hooked via AJAX in versions up to, and including, 7.1.2. This makes it possible for authenticated attackers, with subscriber-level access and above, to disconnect the sites serv account.

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-862: Missing Authorization

Reaching this weakness in Image Optimizer, Resizer and CDN <= 7.1.2 takes a caller who can reach the endpoint. A missing authorization check means a function is reachable by anyone who can reach the endpoint, because the code never asks whether the caller is allowed to perform the action.

Any user who can reach the endpoint gets to run an action reserved for higher-privileged roles, from reading protected data to changing settings or content. For Image Optimizer, Resizer and CDN the fix is 7.1.3: builds <= 7.1.2 are affected, anything from 7.1.3 onward is not.

Remediation

Update to version 7.1.3, 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 Optimizer, Resizer and CDN 7.1.3 closes this, and updating the plugin is the step that ends it.

  • Login Security
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2023-50898https://www.wordfence.com/threat-intel/vulnerabilities/id/a4a67ec6-ee13-4532-8213-d17dbf5f2c55https://nvd.nist.gov/vuln/detail/CVE-2023-50898

Related records

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