CVE-2026-8740Public exploitNetwork attack vector

Authenticated template injection via unneutralized templateContent

Published May 17, 2026 · Updated May 17, 2026

Server-side template injection in PublicCMS 5.202506.d allows remote authenticated users to alter rendered output via templateContent. TemplateResultDirective.execute wraps the supplied value in FreeMarker control syntax and evaluates it as a template without neutralizing embedded directives. A valid application token is required; successful injection can expose or modify limited application data and interrupt service.

CVSS severity6.3
Medium
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Server-side template injection in PublicCMS 5.202506.d allows remote authenticated users to alter rendered output via templateContent. TemplateResultDirective.execute wraps the supplied value in FreeMarker control syntax and evaluates it as a template without neutralizing embedded directives. A valid application token is required; successful injection can expose or modify limited application data and interrupt service.

The record

CVE
CVE-2026-8740
Published
May 17, 2026
Updated
May 17, 2026
Vendor
Tianjin Black Core Technology Co., LTD.
Product
PublicCMS
Classifications
CWE-1336, CWE-791, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 17, 2026CVE publishedPublication date reported by the CVE source.
  2. May 17, 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=5.202506.d

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Tianjin Black Core Technology Co., LTD. · PublicCMSversion=5.202506.d

Published CVSS scores

6.5VulDB CNAAV:N/AC:L/Au:S/C:P/I:P/A:P
6.3VulDB CNACVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
2.1VulDB CNACVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-1336Improper Neutralization of Special Elements Used in a Template Engine
CWE-791Incomplete Filtering of Special Elements
T1190Exploit Public-Facing Application

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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