CVE-2021-25048Public exploitNetwork attack vector

Authenticated stored XSS via unsanitized profile data

Published Apr 4, 2022 · Updated Aug 3, 2024

Stored XSS in King-Theme KingComposer 2.9.6 and earlier allows remote authenticated users to execute script through crafted profiles. The kc_create_profile AJAX action accepts attacker-controlled name, slug, and Base64-encoded data without authorization, CSRF protection, sanitization, or escaping, then stores the profile. Any authenticated WordPress account can plant the payload, which executes in another user's browser when that user retrieves the profile through kc_download_profile.

CVSS severity5.4
Medium
EPSS probability0.64%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in King-Theme KingComposer 2.9.6 and earlier allows remote authenticated users to execute script through crafted profiles. The kc_create_profile AJAX action accepts attacker-controlled name, slug, and Base64-encoded data without authorization, CSRF protection, sanitization, or escaping, then stores the profile. Any authenticated WordPress account can plant the payload, which executes in another user's browser when that user retrieves the profile through kc_download_profile.

The record

CVE
CVE-2021-25048
Published
Apr 4, 2022
Updated
Aug 3, 2024
Vendor
King-Theme
Product
KingComposer
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 4, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record 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=2.9.6 <=2.9.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

King-Theme · KingComposerversion=2.9.6 <=2.9.6

Published CVSS scores

3.5NIST NVDAV:N/AC:M/Au:S/C:N/I:P/A:N
5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007Command and Scripting Interpreter: JavaScript

Public exploit references

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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