PatchTheCVECVE-2023-0556: The ContentStudio plugin for WordPress is vulnerable to authorization bypass due to a missing capability check
CVE-2023-0556 is a critical-severity flaw (CVSS 9.8) affecting contentstudio. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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.
Why this priority
- Critical severity
- Public exploit reference
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 9.8 (Critical) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 1.0% (top 39%) |
| CISA exploited list | No |
| Weakness | CWE-862 |
| Published | 2023-01-27 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2023-0556?
contentstudio: upgrade to 1.2.6. Exact commands for each OS are on this page.
Is CVE-2023-0556 being exploited?
CVE-2023-0556 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2023-0556 affect?
CVE-2023-0556 affects contentstudio. Severity is critical (CVSS 9.8). 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
How urgent is CVE-2023-0556?
Priority 60/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action
Software pages
Related CVEs
- CVE-2023-0558 HIGH 8.2 UPGRADE The ContentStudio plugin for WordPress is vulnerable to authorization bypass due to an unsecure token check th
- CVE-2023-0557 HIGH 7.5 UPGRADE The ContentStudio plugin for WordPress is vulnerable to Sensitive Information Exposure in versions up to, and