CVE-2025-58596Network attack vector

Administrator-level stored script execution via unescaped input

Published Sep 3, 2025 · Updated May 13, 2026

Stored XSS in Proper Fraction LLC MailOptin 1.2.75.0 and earlier allows remote authenticated users to execute scripts in visitor browsers. Published records attribute the flaw to insufficient input sanitization and output escaping but do not identify the affected field, route, or function. Administrator-level access is required, and exposure is limited to WordPress multisite installations or sites where unfiltered_html is disabled; a stored payload runs when a user opens the affected page.

CVSS severity5.9
Medium
EPSS probability0.22%
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 Proper Fraction LLC MailOptin 1.2.75.0 and earlier allows remote authenticated users to execute scripts in visitor browsers. Published records attribute the flaw to insufficient input sanitization and output escaping but do not identify the affected field, route, or function. Administrator-level access is required, and exposure is limited to WordPress multisite installations or sites where unfiltered_html is disabled; a stored payload runs when a user opens the affected page.

The record

CVE
CVE-2025-58596
Published
Sep 3, 2025
Updated
May 13, 2026
Vendor
ProfilePress Membership Team
Product
MailOptin
Classifications
CWE-79, CAPEC-592, T1059.007
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Sep 3, 2025CVE publishedPublication date reported by the CVE source.
  2. May 13, 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 <=1.2.75.0 changes=[{"at":"1.2.75.1","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

ProfilePress Membership Team · MailOptinversion=0 <=1.2.75.0 changes=[{"at":"1.2.75.1","status":"unaffected"}]

Published CVSS scores

5.9PatchstackCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:L
4.4WordfenceCVSS:3.1/AV:N/AC:H/PR:H/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CAPEC-592Stored XSS
T1059.007Command and Scripting Interpreter: JavaScript

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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