How severe is CVE-2024-12451?

CVE-2024-12451 has a CVSS 3.x base score of 6.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2024-12451 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (18th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-12451?

CVE-2024-12451 affects Proxymis Html5 Chat. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-12451?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2024-12451 have an EU (EUVD) identifier?

Yes. CVE-2024-12451 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-50868.

When was CVE-2024-12451 published?

CVE-2024-12451 was published on 2025-01-30 and last updated on 2026-06-17.

CVE-2024-12451

CVE-2024-12451 is a medium-severity vulnerability in Proxymis Html5 Chat with a CVSS 3.x base score of 6.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.4)
EPSS exploit prediction: 0% (18th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-50868
Weakness: CWE-79
Affected product: Proxymis Html5 Chat
Published: 2025-01-30
Last modified: 2026-06-17

Description

The HTML5 chat plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'HTML5CHAT' shortcode in all versions up to, and including, 1.07 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 a user accesses an injected page.

Frequently asked questions

What is CVE-2024-12451?: The HTML5 chat plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'HTML5CHAT' shortcode in all versions up to, and including, 1.07 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 a user accesses an injected page.
How severe is CVE-2024-12451?: CVE-2024-12451 has a CVSS 3.x base score of 6.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2024-12451 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (18th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-12451?: CVE-2024-12451 affects Proxymis Html5 Chat. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-12451?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2024-12451 have an EU (EUVD) identifier?: Yes. CVE-2024-12451 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-50868.
When was CVE-2024-12451 published?: CVE-2024-12451 was published on 2025-01-30 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:proxymis:html5_chat:*:*:*:*:*:wordpress:*:*

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