CVE-2024-53803: Missing Authorization vulnerability in brandtoss WP Mailster wp-mailster allows Exploiting Incorrectly Configu

Q: How do I fix CVE-2024-53803?

wp mailster: upgrade to 1.8.17. Exact commands for each OS are on this page.

Q: Is CVE-2024-53803 being exploited?

CVE-2024-53803 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2024-53803 affect?

CVE-2024-53803 affects wp mailster. Severity is medium (CVSS 6.5). Missing Authorization vulnerability in brandtoss WP Mailster wp-mailster allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects WP Mailster: from n/a through <= 1.8.16.0.

Q: How urgent is CVE-2024-53803?

Priority 34/100. No elevated risk signals yet.

Routine

MEDIUM 6.5UPGRADE

CVE-2024-53803 is a medium-severity flaw (CVSS 6.5) affecting wp mailster. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Missing Authorization vulnerability in brandtoss WP Mailster wp-mailster allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects WP Mailster: from n/a through <= 1.8.16.0.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.5% (top 56%)
CISA exploited list	No
Weakness	CWE-862
Published	2024-12-06
Last modified	2026-06-17

Publisher (CNA): Patchstack · Vendor: wpmailster

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

Am I affected?

Timeline

2024-12-06 14:15 UTCPublished CVE record published
2026-06-17 08:09 UTCUpdated Record last modified

wpmailster wp mailster UPGRADE

Affected: < 1.8.17

Fixed in: 1.8.17

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy wp-mailster || rpm -q wp-mailster || wp-mailster --version

2. UPGRADE to 1.8.17 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade wp-mailster

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade wp-mailster

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-2024-53803?

wp mailster: upgrade to 1.8.17. Exact commands for each OS are on this page.

Is CVE-2024-53803 being exploited?

CVE-2024-53803 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-2024-53803 affect?

CVE-2024-53803 affects wp mailster. Severity is medium (CVSS 6.5). Missing Authorization vulnerability in brandtoss WP Mailster wp-mailster allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects WP Mailster: from n/a through <= 1.8.16.0.

How urgent is CVE-2024-53803?

Priority 34/100. No elevated risk signals yet.

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References

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