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CVE-2023-0733: The Newsletter Popup WordPress plugin through 1.2 does not sanitise and escape some of its settings, which cou

37
Routine
MEDIUM 6.1UPGRADE

CVE-2023-0733 is a medium-severity flaw (CVSS 6.1) affecting newsletter popup. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The Newsletter Popup WordPress plugin through 1.2 does not sanitise and escape some of its settings, which could allow unauthenticated users to perform Stored Cross-Site Scripting attacks

Why this priority

  • Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score6.1 (Medium)
Attack vectorNetwork (remote)
Attack complexityLow
Privileges neededNone
User interactionRequired
EPSS exploit chance0.5% (top 57%)
CISA exploited listNo
Published2023-05-30
Last modified2026-06-17
Publisher (CNA): WPScan · Vendor: newsletter popup project

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Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

newsletter popup project newsletter popup UPGRADE
Affected: <= 1.2
Fixed in: newer than 1.2
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy newsletter-popup || rpm -q newsletter-popup || newsletter-popup --version
2. UPGRADE to newer than 1.2 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade newsletter-popup
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade newsletter-popup
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2023-0733?

newsletter popup: upgrade to newer than 1.2. Exact commands for each OS are on this page.

Is CVE-2023-0733 being exploited?

CVE-2023-0733 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2023-0733 affect?

CVE-2023-0733 affects newsletter popup. Severity is medium (CVSS 6.1). The Newsletter Popup WordPress plugin through 1.2 does not sanitise and escape some of its settings, which could allow unauthenticated users to perform Stored Cross-Site Scripting attacks

How urgent is CVE-2023-0733?

Priority 37/100. Public exploit reference

Software pages

WordPress vulnerabilities

Related CVEs

References

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