CVE-2025-24559: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in brandtos

Q: How do I fix CVE-2025-24559?

wp mailster: upgrade to 1.8.16. Exact commands for each OS are on this page.

Q: Is CVE-2025-24559 being exploited?

CVE-2025-24559 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-2025-24559 affect?

CVE-2025-24559 affects wp mailster. Severity is high (CVSS 7.1). Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in brandtoss WP Mailster wp-mailster allows Reflected XSS.This issue affects WP Mailster: from n/a through <= 1.8.15.0.

Routine

HIGH 7.1UPGRADE

CVE-2025-24559 is a high-severity flaw (CVSS 7.1) affecting wp mailster. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in brandtoss WP Mailster wp-mailster allows Reflected XSS.This issue affects WP Mailster: from n/a through <= 1.8.15.0.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	7.1 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.3% (top 75%)
CISA exploited list	No
Weakness	CWE-79
Published	2025-02-03
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

2025-02-03 15:15 UTCPublished CVE record published
2026-06-17 08:59 UTCUpdated Record last modified

wpmailster wp mailster UPGRADE

Affected: < 1.8.16

Fixed in: 1.8.16

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 1.8.16 (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-2025-24559?

wp mailster: upgrade to 1.8.16. Exact commands for each OS are on this page.

Is CVE-2025-24559 being exploited?

CVE-2025-24559 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-2025-24559 affect?

CVE-2025-24559 affects wp mailster. Severity is high (CVSS 7.1). Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in brandtoss WP Mailster wp-mailster allows Reflected XSS.This issue affects WP Mailster: from n/a through <= 1.8.15.0.

How urgent is CVE-2025-24559?

Priority 31/100. High severity

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References

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