CVE-2026-89330Network attack vector

Reflected XSS via unescaped unique parameter

Published Sep 18, 2026 · Updated Sep 18, 2026

Reflected XSS in EmbedPress 4.6.5 and earlier allows remote attackers to execute scripts through a crafted unique parameter. Feature_Enhancer.php places the attacker-controlled unique value into generated URL attributes without the esc_url() output wrapper removed during the 4.3.0 refactor. Execution requires a user to follow the crafted link, after which the script runs in the affected site's browser origin and can read or alter page-accessible data.

CVSS severity6.1
Medium
EPSS probability0.21%
Next 30 days · Sep 20, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in EmbedPress 4.6.5 and earlier allows remote attackers to execute scripts through a crafted unique parameter. Feature_Enhancer.php places the attacker-controlled unique value into generated URL attributes without the esc_url() output wrapper removed during the 4.3.0 refactor. Execution requires a user to follow the crafted link, after which the script runs in the affected site's browser origin and can read or alter page-accessible data.

The record

CVE
CVE-2026-89330
Published
Sep 18, 2026
Updated
Sep 18, 2026
Vendor
ReviewX Team
Product
EmbedPress
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 18, 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 <=4.6.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

ReviewX Team · EmbedPressversion=0 <=4.6.5

Published CVSS scores

6.1WordfenceCVSS:3.1/AV:N/AC:L/PR:N/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 13, 2026Sep 19, 2026
Latest reporting daySep 19, 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')
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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