CVE-2023-0556Network attack vector

Unauthenticated token disclosure via unchecked metadata access

Published Jan 27, 2023 · Updated Apr 8, 2026

Missing authorization in ContentStudio for WordPress 1.2.5 and earlier allows remote attackers to read blog metadata without authentication. The cstu_get_metadata function returns arbitrary metadata, including the contentstudio_token, without performing a capability check. No account is required; exposure of the token permits additional plugin interactions, including post creation on versions before 1.2.5.

CVSS severity9.8
Critical
EPSS probability0.95%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in ContentStudio for WordPress 1.2.5 and earlier allows remote attackers to read blog metadata without authentication. The cstu_get_metadata function returns arbitrary metadata, including the contentstudio_token, without performing a capability check. No account is required; exposure of the token permits additional plugin interactions, including post creation on versions before 1.2.5.

The record

CVE
CVE-2023-0556
Published
Jan 27, 2023
Updated
Apr 8, 2026
Vendor
ContentStudio
Product
ContentStudio
Classifications
CWE-862, T1528
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 27, 2023CVE publishedPublication date reported by the CVE source.
  2. Apr 8, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=1.2.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

ContentStudio · ContentStudioversion=0 <=1.2.5

Published CVSS scores

9.8WordfenceCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization
T1528Steal Application Access Token

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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