CVE-2023-27634Network attack vector

Arbitrary file upload via missing nonce validation

Published Jun 15, 2023 · Updated Apr 28, 2026

Cross-site request forgery in Shingo Intrepidity 1.5.1 and earlier allows remote attackers to upload files through an administrator's browser. The mytheme_add_admin function accepts forged state-changing requests because nonce validation is missing or incorrect. Exploitation requires an administrator to follow an attacker-controlled link; successful requests can also change theme options.

CVSS severity8.8
High
EPSS probability0.32%
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 Shingo Intrepidity 1.5.1 and earlier allows remote attackers to upload files through an administrator's browser. The mytheme_add_admin function accepts forged state-changing requests because nonce validation is missing or incorrect. Exploitation requires an administrator to follow an attacker-controlled link; successful requests can also change theme options.

The record

CVE
CVE-2023-27634
Published
Jun 15, 2023
Updated
Apr 28, 2026
Vendor
Shingo
Product
Intrepidity
Classifications
CWE-352, CAPEC-62, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 15, 2023CVE publishedPublication date reported by the CVE source.
  2. Apr 28, 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=n/a <=1.5.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Shingo · Intrepidityversion=n/a <=1.5.1

Published CVSS scores

8.8PatchstackCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
8.8NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

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-352Cross-Site Request Forgery (CSRF)
CAPEC-62Cross Site Request Forgery
T1204.001User Execution Malicious Link

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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