CVE-2021-24677

Find My Blocks < 3.4.0 - Sensitive Information Disclosure

2021-09-15 00:00

Strategic Overview

Status: Patched in 3.4.0
Affected Plugin: Find My Blocks – Locate blocks on your site
Affected Version: < 3.4.0
CVSS: 5.3Medium
Weakness type: CWE-862 · Missing Authorization
CVE: CVE-2021-24677

View all Find My Blocks – Locate blocks on your site vulnerabilities

At a glance

CVE-2021-24677 is a medium-severity Missing Authorization vulnerability in the Find My Blocks WordPress plugin, affecting versions < 3.4.0. It carries a CVSS score of 5.3 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 3.4.0; sites on affected versions should update now. Disclosed September 2021, reported by apple502j.

Vulnerability Overview

The Find My Blocks WordPress plugin before 3.4.0 does not have authorisation checks in its REST API, which could allow unauthenticated users to enumerate private posts' titles.

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.

CWE-862: Missing Authorization

Reaching this weakness in Find My Blocks < 3.4.0 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 Find My Blocks the fix is 3.4.0: builds < 3.4.0 are affected, anything from 3.4.0 onward is not.

Remediation

Update to version 3.4.0, 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: Find My Blocks 3.4.0 closes this, and updating the plugin is the step that ends it.

Login Security
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2021-24677 https://www.wordfence.com/threat-intel/vulnerabilities/id/e4a8a202-e44a-4874-9e7a-c8224edd8591 https://nvd.nist.gov/vuln/detail/CVE-2021-24677

CVSS Vector

5.3

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
ConfidentialityLow
IntegrityNone
AvailabilityNone

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