CVE-2026-7634Public exploitNetwork attack vector

Unauthenticated stored XSS via User-Agent row update

Published May 28, 2026 · Updated May 28, 2026

Stored XSS in VeronaLabs SlimStat Analytics 5.4.11 and earlier allows remote attackers to inject scripts through the User-Agent header. Storage::updateRow writes an unsanitized replacement user_agent value after redirects or AJAX follow-ups, and inline_help renders it without safe HTML filtering. Execution requires an administrator to enable the disabled-by-default show_complete_user_agent_tooltip setting and a user to view the affected report tooltip.

CVSS severity7.2
High
EPSS probability0.44%
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 VeronaLabs SlimStat Analytics 5.4.11 and earlier allows remote attackers to inject scripts through the User-Agent header. Storage::updateRow writes an unsanitized replacement user_agent value after redirects or AJAX follow-ups, and inline_help renders it without safe HTML filtering. Execution requires an administrator to enable the disabled-by-default show_complete_user_agent_tooltip setting and a user to view the affected report tooltip.

The record

CVE
CVE-2026-7634
Published
May 28, 2026
Updated
May 28, 2026
Vendor
VeronaLabs
Product
SlimStat Analytics
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 28, 2026CVE publishedPublication date reported by the CVE source.
  2. May 28, 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 <=5.4.11

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

VeronaLabs · SlimStat Analyticsversion=0 <=5.4.11

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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
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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