CVE-2026-8886Network attack vector

Stored XSS via unescaped title shortcode attribute

Published May 27, 2026 · Updated May 27, 2026

Stored XSS in huankong hk_shortcode 1.0 and earlier allows remote authenticated users to inject scripts through the title-plane shortcode. The huankong_post_short_title_plane() handler concatenates the user-controlled title value directly into HTML without sanitization or output escaping. Contributor-level access is required, and the injected script executes in the browser of any user who opens the affected page.

CVSS severity6.4
Medium
EPSS probability0.20%
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 huankong hk_shortcode 1.0 and earlier allows remote authenticated users to inject scripts through the title-plane shortcode. The huankong_post_short_title_plane() handler concatenates the user-controlled title value directly into HTML without sanitization or output escaping. Contributor-level access is required, and the injected script executes in the browser of any user who opens the affected page.

The record

CVE
CVE-2026-8886
Published
May 27, 2026
Updated
May 27, 2026
Vendor
huankong
Product
hk_shortcode
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 27, 2026CVE publishedPublication date reported by the CVE source.
  2. May 27, 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 <=1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

huankong · hk_shortcodeversion=0 <=1.0

Published CVSS scores

6.4Wordfence IntelligenceCVSS:3.1/AV:N/AC:L/PR:L/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.

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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 exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007JavaScript/JScript

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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