CVE-2021-36877Network attack vector

User-role modification via missing CSRF validation

Published Sep 27, 2021 · Updated Apr 28, 2026

Cross-site request forgery in StylemixThemes uListing 2.0.5 and earlier allows remote attackers to modify WordPress user roles. Public sources do not identify the affected request handler or the missing request-token validation. Exploitation requires a logged-in user authorized to change roles to submit an attacker-controlled request, allowing account privileges to be reassigned.

CVSS severity6.5
Medium
EPSS probability0.44%
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 StylemixThemes uListing 2.0.5 and earlier allows remote attackers to modify WordPress user roles. Public sources do not identify the affected request handler or the missing request-token validation. Exploitation requires a logged-in user authorized to change roles to submit an attacker-controlled request, allowing account privileges to be reassigned.

The record

CVE
CVE-2021-36877
Published
Sep 27, 2021
Updated
Apr 28, 2026
Vendor
StylemixThemes
Product
uListing
Classifications
CWE-352
Attack vector
network
Privileges
unauthenticated

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

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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=<= 2.0.5 <=2.0.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

StylemixThemes · uListingversion=<= 2.0.5 <=2.0.5

Published CVSS scores

4.3NVDAV:N/AC:M/Au:N/C:N/I:P/A:N
4.3PatchstackCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
6.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/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-352Cross-Site Request Forgery (CSRF)

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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