CVE-2019-3396Known exploitationPublic exploitNetwork attack vectorHinoki check available

Unauthenticated code execution via attacker-selected templates

Published Mar 25, 2019 · Updated Oct 21, 2025

Template injection in Atlassian Confluence Server's Widget Connector allows remote attackers to execute code via macro preview requests. The /rest/tinymce/1/macro/preview endpoint accepts an attacker-controlled _template parameter and renders the selected resource as a Velocity template. Exploitation requires a reachable vulnerable instance with Widget Connector enabled, but no credentials or user interaction; injected templates execute code with the server process's privileges.

CVSS severity9.8
Critical
EPSS probability99.91%
Next 30 days · Nov 1, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Template injection in Atlassian Confluence Server's Widget Connector allows remote attackers to execute code via macro preview requests. The /rest/tinymce/1/macro/preview endpoint accepts an attacker-controlled _template parameter and renders the selected resource as a Velocity template. Exploitation requires a reachable vulnerable instance with Widget Connector enabled, but no credentials or user interaction; injected templates execute code with the server process's privileges.

The record

CVE
CVE-2019-3396
Published
Mar 25, 2019
Updated
Oct 21, 2025
Vendor
Atlassian
Product
Confluence Server
Classifications
CWE-22, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 25, 2019CVE publishedPublication date reported by the CVE source.
  2. Oct 21, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=6.7.0 <unspecified
  2. Affected versionversion=next of 6.13.0 <unspecified
  3. Affected versionversion=next of 6.14.0 <unspecified
  4. Affected versionversion=unspecified <6.12.3
  5. Affected versionversion=unspecified <6.13.3
  6. Affected versionversion=unspecified <6.14.2
  7. Affected versionversion=unspecified <6.6.12

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Atlassian · Confluence Serverversion=6.7.0 <unspecified; version=next of 6.13.0 <unspecified; version=next of 6.14.0 <unspecified; version=unspecified <6.12.3; version=unspecified <6.13.3; version=unspecified <6.14.2; version=unspecified <6.6.12

Published CVSS scores

9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsShadowserver observations through Sep 28, 2026. Gaps indicate unavailable data.
Sep 22, 2026Sep 28, 2026
View daily counts
Reporting dayUnique IPs
Sep 22, 202613
Sep 23, 20266
Sep 24, 202618
Sep 25, 202618
Sep 26, 20269
Sep 27, 202617
Sep 28, 202610
Latest reporting daySep 28, 2026
Latest daily unique IPs10
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationReported
Public exploitPublished

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Reported exploitation

Technologies

Your stack

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Your stack

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