CVE-2026-9756Public exploitNetwork attack vector

Contributor-level stored XSS via unescaped dynamic link

Published Jul 3, 2026 · Updated Jul 3, 2026

Stored XSS in GenerateBlocks 2.2.1 and earlier allows remote authenticated users to execute JavaScript through a crafted Headline block. The Headline renderer reads an allowlisted user-profile description through linkMetaFieldType and inserts the resulting dynamic URL into href without rejecting the javascript scheme. Contributor access is required to store the profile value and crafted block; JavaScript runs in the browser context of any visitor who clicks the link, including administrators.

CVSS severity6.4
Medium
EPSS probability0.36%
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 GenerateBlocks 2.2.1 and earlier allows remote authenticated users to execute JavaScript through a crafted Headline block. The Headline renderer reads an allowlisted user-profile description through linkMetaFieldType and inserts the resulting dynamic URL into href without rejecting the javascript scheme. Contributor access is required to store the profile value and crafted block; JavaScript runs in the browser context of any visitor who clicks the link, including administrators.

The record

CVE
CVE-2026-9756
Published
Jul 3, 2026
Updated
Jul 3, 2026
Vendor
EDGE22 Studios Ltd.
Product
GenerateBlocks
Classifications
CWE-79, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 3, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 3, 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 <=2.2.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

EDGE22 Studios Ltd. · GenerateBlocksversion=0 <=2.2.1

Published CVSS scores

6.4WordfenceCVSS: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 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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