CVE-2026-77233Network attack vector

Unauthenticated stored XSS via AdSense regex rewrite

Published Sep 5, 2026 · Updated Sep 8, 2026

Stored XSS in iubenda All-in-one Compliance 3.13.4 and earlier allows remote attackers to inject scripts through comment content. The Secondary parser's AdSense regular-expression rewrite processes stored comment HTML without sufficient sanitization or output escaping. The non-default Secondary parser, configured as parser_engine=default, must be active; the script executes in the site's origin when a visitor opens the affected page.

CVSS severity7.2
High
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 iubenda All-in-one Compliance 3.13.4 and earlier allows remote attackers to inject scripts through comment content. The Secondary parser's AdSense regular-expression rewrite processes stored comment HTML without sufficient sanitization or output escaping. The non-default Secondary parser, configured as parser_engine=default, must be active; the script executes in the site's origin when a visitor opens the affected page.

The record

CVE
CVE-2026-77233
Published
Sep 5, 2026
Updated
Sep 8, 2026
Vendor
iubenda
Product
iubenda | All-in-one Compliance for GDPR / CCPA Cookie Consent + more
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 5, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 8, 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 <=3.13.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

iubenda · iubenda | All-in-one Compliance for GDPR / CCPA Cookie Consent + moreversion=0 <=3.13.4

Published CVSS scores

7.2WordfenceCVSS:3.1/AV:N/AC:L/PR:N/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.

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')
T1059.007JavaScript/JScript

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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