Auth bypass in Contentstudio
CVE-2023-0556
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.
Vulnerability class: Broken Access Control
EPSS: 0.010 (57.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Contentstudio — versions 0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security@wordfence.com
- security@wordfence.com (Exploit, Third Party Advisory)
- security@wordfence.com (Patch, Third Party Advisory)
- af854a3a-2127-422b-91ae-364da2661108 (Third Party Advisory)
Frequently asked questions
- What is CVE-2023-0556?
- CVE-2023-0556 is a critical-severity vulnerability in Contentstudio, classified under Missing Authorization. CVSS score: 9.8/10. Published 2023-01-27.
- How severe is CVE-2023-0556?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2023-0556 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.