CVE-2020-36709Public exploitNetwork attack vector

Stored XSS via unescaped shortcode attributes

Published Jun 7, 2023 · Updated Apr 8, 2026

Stored XSS in King-Theme KingComposer before 2.9.4 allows remote authenticated users to inject scripts through crafted shortcodes. In kingcomposer/shortcodes/kc_row_inner.php, the column_align attribute is inserted into data-kc-equalheight-align without output escaping. An authenticated account with shortcode-editing access must save the payload, which runs in the browser of anyone viewing the affected page.

CVSS severity5.5
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 before 2.9.4 allows remote authenticated users to inject scripts through crafted shortcodes. In kingcomposer/shortcodes/kc_row_inner.php, the column_align attribute is inserted into data-kc-equalheight-align without output escaping. An authenticated account with shortcode-editing access must save the payload, which runs in the browser of anyone viewing the affected page.

The record

CVE
CVE-2020-36709
Published
Jun 7, 2023
Updated
Apr 8, 2026
Vendor
King-Theme
Product
KingComposer
Classifications
CWE-79, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 7, 2023CVE publishedPublication date reported by the CVE source.
  2. Apr 8, 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=0 <2.9.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

King-Theme · KingComposerversion=0 <2.9.4

Published CVSS scores

4.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
5.5WordfenceCVSS:3.1/AV:N/AC:L/PR:H/UI:N/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')
T1203Exploitation for Client Execution

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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