CVE•Published 2023-01-27•Modified 2026-04-08•1 article on news•5 live references•NVD data

CVE-2023-0556Contentstudio · Contentstudio

Vulnerability data via NVD (ingested)

CVSS v3.1

9.8

CRITICAL

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

EPSS percentile

Exploit Prediction Scoring System · top 18% of all CVEs

Weaknesses (CWE)

CWE-862Missing Authorization

Description

The ContentStudio plugin for WordPress is vulnerable to authorization bypass due to a missing capability check on several functions in versions up to, and including, 1.2.5. This makes it possible for unauthenticated attackers to obtain the blog metadata (via the function cstu_get_metadata) that includes the plugin's contentstudio_token. Knowing this token allows for other interactions with the plugin such as creating posts in versions prior to 1.2.5, which added other requirements to posting and updating.

Timeline

Published 2023-01-27

Modified 2026-04-08

External references

NVD MITRE Exploit-DB trickest/cve VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag0 hosts

vuln:CVE-2023-0556

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · WP plugin path

http.html:"/wp-content/plugins/contentstudio/"

Matches any site loading the "contentstudio" plugin — doesn't rely on Shodan's vuln tag.

Shodan · product

product:"Contentstudio Contentstudio"

All exposed Contentstudio Contentstudio instances — cross-reference with the CVE's affected-version range.

Shodan · banner/body mention

http.html:"Contentstudio"

HTTP body or banner mentions "Contentstudio" — catches deploys Shodan didn't identify as a product.