CVE-2022-50955Public exploitNetwork attack vector

Maintenance-mode toggling via missing nonce validation

Published May 10, 2026 · Updated May 10, 2026

Cross-site request forgery in Curtain 1.0.2 allows remote attackers to toggle WordPress maintenance mode through a forged request. The options-general.php Curtain handler accepts page, mode, and an empty _wpnonce value without validating that the administrator authorized the change. Exploitation requires an authenticated administrator's browser to submit the crafted request, which activates or deactivates site maintenance mode.

CVSS severity5.3
Medium
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site request forgery in Curtain 1.0.2 allows remote attackers to toggle WordPress maintenance mode through a forged request. The options-general.php Curtain handler accepts page, mode, and an empty _wpnonce value without validating that the administrator authorized the change. Exploitation requires an authenticated administrator's browser to submit the crafted request, which activates or deactivates site maintenance mode.

The record

CVE
CVE-2022-50955
Published
May 10, 2026
Updated
May 10, 2026
Vendor
Curtain
Product
Curtain
Classifications
CWE-352, T1204
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 10, 2026CVE publishedPublication date reported by the CVE source.
  2. May 10, 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=1.0.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Curtain · Curtainversion=1.0.2

Published CVSS scores

4.3VulnCheckCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
5.3VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:L/SI:L/SA:L

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 exploitPublished

Weakness, pattern, technique

CWE-352Cross-Site Request Forgery (CSRF)
T1204User Execution

Public exploit references

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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