CVE-2026-34900Network attack vector

Reflected XSS via unescaped form preview class

Published Jun 15, 2026 · Updated Jun 15, 2026

Reflected XSS in StellarWP GiveWP 4.14.2 and earlier allows remote attackers to execute scripts via a crafted form-preview request. FormSettings::fromArray accepts an unsanitized designId, and DonationFormViewModel::render inserts the resulting classNames into an HTML class attribute without escaping. Exploitation requires a victim to open the crafted link; script execution occurs in the affected site's origin and can read or alter data available to that browser session.

CVSS severity7.1
High
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in StellarWP GiveWP 4.14.2 and earlier allows remote attackers to execute scripts via a crafted form-preview request. FormSettings::fromArray accepts an unsanitized designId, and DonationFormViewModel::render inserts the resulting classNames into an HTML class attribute without escaping. Exploitation requires a victim to open the crafted link; script execution occurs in the affected site's origin and can read or alter data available to that browser session.

The record

CVE
CVE-2026-34900
Published
Jun 15, 2026
Updated
Jun 15, 2026
Vendor
Liquid Web
Product
GiveWP
Classifications
CWE-79, CAPEC-591, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 15, 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=n/a <=4.14.2 changes=[{"at":"4.14.3","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Liquid Web · GiveWPversion=n/a <=4.14.2 changes=[{"at":"4.14.3","status":"unaffected"}]

Published CVSS scores

7.1PatchstackCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L

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')
CAPEC-591Reflected XSS
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

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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