CVE-2023-0558: The ContentStudio plugin for WordPress is vulnerable to authorization bypass due to an unsecure token check th

Q: How do I fix CVE-2023-0558?

contentstudio: upgrade to 1.2.6. Exact commands for each OS are on this page.

Q: Is CVE-2023-0558 being exploited?

CVE-2023-0558 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2023-0558 affect?

CVE-2023-0558 affects contentstudio. Severity is high (CVSS 8.2). The ContentStudio plugin for WordPress is vulnerable to authorization bypass due to an unsecure token check that is susceptible to type juggling in versions up to, and including, 1.2.5. This makes it possible for unauthenticated attackers t

Q: How urgent is CVE-2023-0558?

Priority 53/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

HIGH 8.2REMOTEUPGRADE

CVE-2023-0558 is a high-severity flaw (CVSS 8.2) 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 an unsecure token check that is susceptible to type juggling in versions up to, and including, 1.2.5. This makes it possible for unauthenticated attackers to execute functions intended for use by users with proper API keys.

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	8.2 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.9% (top 41%)
CISA exploited list	No
Weakness	CWE-639
Published	2023-01-27
Last modified	2026-06-17

Publisher (CNA): Wordfence · Vendor: contentstudio

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2023-01-27 22:15 UTCPublished CVE record published
2026-06-17 05:25 UTCUpdated Record last modified

contentstudio contentstudio UPGRADE

Affected: < 1.2.6

Fixed in: 1.2.6

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy contentstudio || rpm -q contentstudio || contentstudio --version

2. UPGRADE to 1.2.6 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade contentstudio

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade contentstudio

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
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-2023-0558?

contentstudio: upgrade to 1.2.6. Exact commands for each OS are on this page.

Is CVE-2023-0558 being exploited?

CVE-2023-0558 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-2023-0558 affect?

CVE-2023-0558 affects contentstudio. Severity is high (CVSS 8.2). The ContentStudio plugin for WordPress is vulnerable to authorization bypass due to an unsecure token check that is susceptible to type juggling in versions up to, and including, 1.2.5. This makes it possible for unauthenticated attackers t

How urgent is CVE-2023-0558?

Priority 53/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

WordPress vulnerabilities

Related CVEs

CVE-2023-0557 HIGH 7.5 UPGRADE The ContentStudio plugin for WordPress is vulnerable to Sensitive Information Exposure in versions up to, and
CVE-2023-0556 CRITICAL 9.8 UPGRADE The ContentStudio plugin for WordPress is vulnerable to authorization bypass due to a missing capability check

References

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