CVE-2026-57322Public exploitNetwork attack vector

Reflected XSS via unescaped form preview identifier

Published Jun 26, 2026 · Updated Jun 26, 2026

Reflected XSS in the weMail form-preview AJAX handler in 2.1.2 and earlier allows remote attackers to execute script in a victim's browser. FormPreview::render_form_component inserts an attacker-controlled form_id into an HTML id attribute without escaping and exposes the preview without a capability or nonce check. A logged-in WordPress user must open the crafted preview URL; the script then runs in that site's browser origin.

CVSS severity7.1
High
EPSS probability0.25%
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 the weMail form-preview AJAX handler in 2.1.2 and earlier allows remote attackers to execute script in a victim's browser. FormPreview::render_form_component inserts an attacker-controlled form_id into an HTML id attribute without escaping and exposes the preview without a capability or nonce check. A logged-in WordPress user must open the crafted preview URL; the script then runs in that site's browser origin.

The record

CVE
CVE-2026-57322
Published
Jun 26, 2026
Updated
Jun 26, 2026
Vendor
HappyMonster
Product
weMail
Classifications
CWE-79, CAPEC-591, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 26, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 26, 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 <=2.1.2 changes=[{"at":"2.1.3","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

HappyMonster · weMailversion=n/a <=2.1.2 changes=[{"at":"2.1.3","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 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')
CAPEC-591Reflected XSS
T1204.001Malicious Link

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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