CVE-2025-5540: The Event RSVP and Simple Event Management Plugin plugin for WordPress is vulnerable to Stored Cross-Site Scri

Q: How do I fix CVE-2025-5540?

event rsvp and simple event management: upgrade to newer than 4.1.0. Exact commands for each OS are on this page.

Q: Is CVE-2025-5540 being exploited?

CVE-2025-5540 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-2025-5540 affect?

CVE-2025-5540 affects event rsvp and simple event management. Severity is medium (CVSS 6.4). The Event RSVP and Simple Event Management Plugin plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'emd_mb_meta' shortcode in all versions up to, and including, 4.1.0 due to insufficient input sanitization

Q: How urgent is CVE-2025-5540?

Priority 26/100. No elevated risk signals yet.

Routine

MEDIUM 6.4UPGRADE

CVE-2025-5540 is a medium-severity flaw (CVSS 6.4) affecting event rsvp and simple event management. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The Event RSVP and Simple Event Management Plugin plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'emd_mb_meta' shortcode in all versions up to, and including, 4.1.0 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.4 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.2% (top 85%)
CISA exploited list	No
Weakness	CWE-79
Published	2025-06-26
Last modified	2026-06-17

Publisher (CNA): Wordfence · Vendor: emarketdesign

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

Am I affected?

Timeline

2025-06-26 02:15 UTCPublished CVE record published
2026-06-17 09:48 UTCUpdated Record last modified

emarketdesign event rsvp and simple event management UPGRADE

Affected: <= 4.1.0

Fixed in: newer than 4.1.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy event-rsvp-and-simple-event-management || rpm -q event-rsvp-and-simple-event-management || event-rsvp-and-simple-event-management --version

2. UPGRADE to newer than 4.1.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade event-rsvp-and-simple-event-management

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade event-rsvp-and-simple-event-management

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-2025-5540?

event rsvp and simple event management: upgrade to newer than 4.1.0. Exact commands for each OS are on this page.

Is CVE-2025-5540 being exploited?

CVE-2025-5540 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-2025-5540 affect?

CVE-2025-5540 affects event rsvp and simple event management. Severity is medium (CVSS 6.4). The Event RSVP and Simple Event Management Plugin plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'emd_mb_meta' shortcode in all versions up to, and including, 4.1.0 due to insufficient input sanitization

How urgent is CVE-2025-5540?

Priority 26/100. No elevated risk signals yet.

Software pages

WordPress vulnerabilities

References

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