CVE-2021-36880Network attack vector

Unauthenticated SQL injection via custom parameter

Published Sep 27, 2021 · Updated Apr 28, 2026

SQL injection in StylemixThemes uListing 2.0.3 and earlier allows remote attackers to manipulate database queries via the custom parameter. Public records identify the parameter but do not disclose the receiving endpoint, code locus, or unsafe query construction. The request requires no authentication or user interaction; successful injection permits database reads, unauthorized changes, and service interruption.

CVSS severity8.6
High
EPSS probability2.10%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SQL injection in StylemixThemes uListing 2.0.3 and earlier allows remote attackers to manipulate database queries via the custom parameter. Public records identify the parameter but do not disclose the receiving endpoint, code locus, or unsafe query construction. The request requires no authentication or user interaction; successful injection permits database reads, unauthorized changes, and service interruption.

The record

CVE
CVE-2021-36880
Published
Sep 27, 2021
Updated
Apr 28, 2026
Vendor
StylemixThemes
Product
uListing
Classifications
CWE-89, T1190
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=<= 2.0.3 <=2.0.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

StylemixThemes · uListingversion=<= 2.0.3 <=2.0.3

Published CVSS scores

7.5NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:P
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
8.6PatchstackCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-89Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
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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