Cyber Resilience

CVE-2025-30858

High

Published: 03 April 2025

Published
03 April 2025
Modified
23 April 2026
KEV Added
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Patch
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CVSS Score v3.1 7.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
EPSS Score 0.0067 71.8th percentile
Risk Priority 15 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2025-30858 is a high-severity Cross-site Scripting (CWE-79) vulnerability. Its CVSS base score is 7.1 (High).

Operationally, ranked in the top 28.2% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

Deeper analysis

The vulnerability is a reflected cross-site scripting flaw (CWE-79) in the Snow Storm plugin for WordPress, published by Tribulant Software. It stems from improper neutralization of input during web page generation and affects all versions through 1.4.6. The issue carries a CVSS 3.1 score of 7.1.

An unauthenticated remote attacker can supply a crafted URL that triggers script execution in a victim's browser when the link is visited. Successful exploitation allows limited impacts to confidentiality, integrity, and availability within the context of the affected site, with the attack requiring user interaction but no prior authentication.

The Patchstack advisory at the referenced URL documents the reflected XSS issue and identifies the affected plugin versions. The associated EPSS score remains low, with a current value of 0.0067 and a peak of 0.0111.

EU & UK References

Vulnerability details

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Tribulant Software Snow Storm snow-storm allows Reflected XSS.This issue affects Snow Storm: from n/a through <= 1.4.6.

CWE(s)
CWE-79

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

CA-8 Penetration Testing
addresses: CWE-79

Penetration testing submits XSS payloads to web applications, detecting cross-site scripting flaws for subsequent remediation.

SI-10 Information Input Validation
addresses: CWE-79

Validates web inputs to reject script-related content that could produce XSS.

SI-15 Information Output Filtering
addresses: CWE-79

Output validation against expected content can reject or sanitize script content in generated web pages, reducing XSS exploitability.

References