CVE-2026-18202Public exploitNetwork attack vector

Author-level stored XSS via unsanitized SVG uploads

Published Aug 19, 2026 · Updated Aug 19, 2026

Stored XSS in Crocoblock JetEngine before 3.8.14 allows remote authenticated users to execute JavaScript through uploaded SVG files. The plugin adds SVG to the site-wide allowed upload types without sanitizing embedded content, then serves the stored file as image/svg+xml. An account with the upload_files capability, such as Author, must upload the file and a victim must open it; multisite upload restrictions are also overridden.

CVSS severity6.8
Medium
EPSS probability0.29%
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 Crocoblock JetEngine before 3.8.14 allows remote authenticated users to execute JavaScript through uploaded SVG files. The plugin adds SVG to the site-wide allowed upload types without sanitizing embedded content, then serves the stored file as image/svg+xml. An account with the upload_files capability, such as Author, must upload the file and a victim must open it; multisite upload restrictions are also overridden.

The record

CVE
CVE-2026-18202
Published
Aug 19, 2026
Updated
Aug 19, 2026
Vendor
Crocoblock
Product
JetEngine
Classifications
CWE-79, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 19, 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 <3.8.14

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Crocoblock · JetEngineversion=0 <3.8.14

Published CVSS scores

6.8CISACVSS:3.1/AV:N/AC:L/PR:H/UI:R/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.

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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 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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