CVE-2024-4483Public exploitNetwork attack vector

Stored XSS via unescaped protection text attribute

Published Jul 29, 2024 · Updated Aug 1, 2024

Stored XSS in Online Optimisation Email Encoder before 2.2.2 allows remote authenticated users to run scripts in another user's browser. The plugin stores WP_Email_Encoder_Bundle_options[protection_text] and writes it into an admin-page attribute without output escaping. Administrator access is required, and exposure is limited to multisite installations or sites with unfiltered_html disabled.

CVSS severity5.4
Medium
EPSS probability0.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Stored XSS in Online Optimisation Email Encoder before 2.2.2 allows remote authenticated users to run scripts in another user's browser. The plugin stores WP_Email_Encoder_Bundle_options[protection_text] and writes it into an admin-page attribute without output escaping. Administrator access is required, and exposure is limited to multisite installations or sites with unfiltered_html disabled.

The record

CVE
CVE-2024-4483
Published
Jul 29, 2024
Updated
Aug 1, 2024
Vendor
Online Optimisation
Product
Email Encoder – Protect Email Addresses and Phone Numbers
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Jul 29, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 1, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <2.2.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Online Optimisation · Email Encoder – Protect Email Addresses and Phone Numbersversion=0 <2.2.2

Published CVSS scores

4.4WordfenceCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N
5.4CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:R/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 exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007JavaScript/JScript

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo