CVE-2025-31077Network attack vector

Contributor-level script execution in visitors' browsers

Published Mar 28, 2025 · Updated Apr 28, 2026

DOM-based XSS in Ultimate Blocks 3.2.7 and earlier allows remote authenticated users to execute scripts in a visitor's browser. The public CNA record and vendor advisory do not disclose the affected block, attacker-controlled input, or unsafe DOM sink. Contributor-level access and interaction by another user are required; execution is confined to the browser context of a page that processes the crafted content.

CVSS severity6.5
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

DOM-based XSS in Ultimate Blocks 3.2.7 and earlier allows remote authenticated users to execute scripts in a visitor's browser. The public CNA record and vendor advisory do not disclose the affected block, attacker-controlled input, or unsafe DOM sink. Contributor-level access and interaction by another user are required; execution is confined to the browser context of a page that processes the crafted content.

The record

CVE
CVE-2025-31077
Published
Mar 28, 2025
Updated
Apr 28, 2026
Vendor
WP Table Builder
Product
Ultimate Blocks
Classifications
CWE-79, CAPEC-588, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 28, 2025CVE publishedPublication date reported by the CVE source.
  2. Apr 28, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=0 <=3.2.7 changes=[{"at":"3.2.8","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

WP Table Builder · Ultimate Blocksversion=0 <=3.2.7 changes=[{"at":"3.2.8","status":"unaffected"}]

Published CVSS scores

6.5Patchstack CNACVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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')
CAPEC-588DOM-Based XSS
T1059.007Command and Scripting Interpreter: JavaScript

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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