CVE-2021-36874Network attack vector

Authenticated IDOR authorization bypass

Published Sep 27, 2021 · Updated Apr 28, 2026

An authorization bypass in StylemixThemes uListing 2.0.5 and earlier allows remote authenticated users to alter unauthorized listing objects. The advisory identifies an insecure direct object reference but does not disclose the endpoint, parameter, or code locus that fails to enforce object ownership. Subscriber-level access is required, and the documented consequence is unauthorized integrity-impacting interaction with listing data rather than unauthenticated access.

CVSS severity8.8
High
EPSS probability1.10%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

An authorization bypass in StylemixThemes uListing 2.0.5 and earlier allows remote authenticated users to alter unauthorized listing objects. The advisory identifies an insecure direct object reference but does not disclose the endpoint, parameter, or code locus that fails to enforce object ownership. Subscriber-level access is required, and the documented consequence is unauthorized integrity-impacting interaction with listing data rather than unauthenticated access.

The record

CVE
CVE-2021-36874
Published
Sep 27, 2021
Updated
Apr 28, 2026
Vendor
StylemixThemes
Product
uListing
Classifications
CWE-639, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 27, 2021CVE 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=<= 2.0.5 <=2.0.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

StylemixThemes · uListingversion=<= 2.0.5 <=2.0.5

Published CVSS scores

6.5NVDAV:N/AC:L/Au:S/C:P/I:P/A:P
7.1PatchstackCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L
8.8NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-639Authorization Bypass Through User-Controlled Key
T1190Exploit Public-Facing Application

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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