CVE-2026-71368Network attack vector

Script execution via unescaped Header.tpl metadata

Published Aug 20, 2026 · Updated Aug 20, 2026

Cross-site scripting in Header.tpl in Thinkingreed Inc. F-RevoCRM 7.3.0 through 8.0.3 allows attackers to execute script via a crafted URL. The v7 Header.tpl templates write _META, _EXTENSIONMETA, and _USERMETA values into inline JavaScript string literals without JavaScript escaping; a request-derived parent parameter can break out of the string, and some user-stored metadata can do the same. Exploitation requires a user to follow a crafted page or URL while logged in, after which code runs in the CRM origin and can trigger unintended actions or expose session data available to that session.

CVSS severity5.1
Medium
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in Header.tpl in Thinkingreed Inc. F-RevoCRM 7.3.0 through 8.0.3 allows attackers to execute script via a crafted URL. The v7 Header.tpl templates write _META, _EXTENSIONMETA, and _USERMETA values into inline JavaScript string literals without JavaScript escaping; a request-derived parent parameter can break out of the string, and some user-stored metadata can do the same. Exploitation requires a user to follow a crafted page or URL while logged in, after which code runs in the CRM origin and can trigger unintended actions or expose session data available to that session.

The record

CVE
CVE-2026-71368
Published
Aug 20, 2026
Updated
Aug 20, 2026
Vendor
Thinkingreed Inc.
Product
F-RevoCRM
Classifications
CWE-79, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 20, 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=7.3.0 through 8.0.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Thinkingreed Inc. · F-RevoCRMversion=7.3.0 through 8.0.3

Published CVSS scores

5.1JPCERT/CCCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
6.1JPCERT/CCCVSS:3.0/AV:N/AC:L/PR:N/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1189Drive-by Compromise

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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