CVE-2025-8316Network attack vector

Stored script execution via unescaped evento parameter

Published Sep 11, 2025 · Updated Apr 8, 2026

Stored XSS in Certifica WP 3.1 and earlier allows remote authenticated users to inject scripts through the evento shortcode parameter. The certificawp shortcode handler accepts the evento attribute and renders its value without sufficient sanitization or contextual output escaping. Contributor-level access is required; the payload persists in page content and executes with the viewing user's web-session privileges whenever that page is accessed.

CVSS severity6.4
Medium
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Certifica WP 3.1 and earlier allows remote authenticated users to inject scripts through the evento shortcode parameter. The certificawp shortcode handler accepts the evento attribute and renders its value without sufficient sanitization or contextual output escaping. Contributor-level access is required; the payload persists in page content and executes with the viewing user's web-session privileges whenever that page is accessed.

The record

CVE
CVE-2025-8316
Published
Sep 11, 2025
Updated
Apr 8, 2026
Vendor
CertificaWP
Product
Certifica WP
Classifications
CWE-79, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 11, 2025CVE publishedPublication date reported by the CVE source.
  2. Apr 8, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=3.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

CertificaWP · Certifica WPversion=0 <=3.1

Published CVSS scores

6.4WordfenceCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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