CVE-2021-36875Network attack vector

Authenticated script execution via unneutralized filter parameters

Published Sep 27, 2021 · Updated Apr 28, 2026

Reflected XSS in StylemixThemes uListing 2.0.5 and earlier allows remote authenticated users to execute scripts via filter parameters. The User Plans interface renders the filter[id], filter[user], filter[expired_date], filter[created_date], and filter[updated_date] values without neutralizing script markup. Administrator privileges are required to initiate the request, and a victim must interact with the crafted content; execution occurs in the victim's browser context.

CVSS severity5.9
Medium
EPSS probability0.77%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in StylemixThemes uListing 2.0.5 and earlier allows remote authenticated users to execute scripts via filter parameters. The User Plans interface renders the filter[id], filter[user], filter[expired_date], filter[created_date], and filter[updated_date] values without neutralizing script markup. Administrator privileges are required to initiate the request, and a victim must interact with the crafted content; execution occurs in the victim's browser context.

The record

CVE
CVE-2021-36875
Published
Sep 27, 2021
Updated
Apr 28, 2026
Vendor
StylemixThemes
Product
uListing
Classifications
CWE-79, CAPEC-591, T1190
Attack vector
network
Privileges
admin

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=n/a <=2.0.5 changes=[{"at":"2.0.6","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

StylemixThemes · uListingversion=n/a <=2.0.5 changes=[{"at":"2.0.6","status":"unaffected"}]

Published CVSS scores

4.8NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
5.9PatchstackCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:L
3.5NVDAV:N/AC:M/Au:S/C:N/I:P/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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CAPEC-591Reflected XSS
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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