What is the CVSS score of CVE-2023-6555?

CVE-2023-6555 has a CVSS 3.1 base score of 6.1 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N. EPSS exploitation probability: 0.4%.

Which versions of Email Subscription Popup are affected by CVE-2023-6555?

Organizations using before 1.2.20 does not sanitise and escape a parameter should be aware of moderate risk from CVE-2023-6555, a cross-site scripting vulnerability rated CVSS 6.1.

Is there a public PoC exploit available for CVE-2023-6555?

Yes, a public proof-of-concept exploit is available for CVE-2023-6555. Prioritise patching immediately. EPSS: 0.4%.

How to fix or mitigate CVE-2023-6555?

Within 30 days: Identify affected systems running before 1.2.20 does not sanitise and escape a parameter and apply vendor patches as part of regular patch cycle. Verify Content-Security-Policy and output encoding.

Email Subscription Popup CVE-2023-6555

MEDIUM

Cross-site Scripting (XSS) (CWE-79)

2024-01-08 contact@wpscan.com

XSS WordPress Email Subscription Popup

6.1

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

6.1 MEDIUM

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 19:34 vuln.today

PoC Detected

Jun 18, 2025 - 17:15 vuln.today

Public exploit code

CVE Published

Jan 08, 2024 - 19:15 nvd

MEDIUM 6.1

DescriptionCVE.org

AnalysisAI

The Email Subscription Popup WordPress plugin before 1.2.20 does not sanitise and escape a parameter before outputting it back in the page, leading to a Reflected Cross-Site Scripting which could be. Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

Technical ContextAI

This vulnerability is classified as Cross-Site Scripting (XSS) (CWE-79), which allows attackers to inject malicious scripts into web pages viewed by other users. The Email Subscription Popup WordPress plugin before 1.2.20 does not sanitise and escape a parameter before outputting it back in the page, leading to a Reflected Cross-Site Scripting which could be used against high privilege users such as admin Affected products include: I13Websolution Email Subscription Popup. Version information: before 1.2.20.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Sanitize all user input, use Content-Security-Policy headers, encode output contextually (HTML, JS, URL). Use frameworks with built-in XSS protection.