CVE-2025-23578
📛 CVE Title
WordPress Custom CSS Addons plugin <= 1.9.1 - Reflected Cross Site Scripting (XSS) vulnerability
Description
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Bastien Ho Custom CSS Addons css-addons allows Reflected XSS.This issue affects Custom CSS Addons: from n/a through <= 1.9.1.
Overview
- State
- PUBLISHED
- Assigner (CNA)
- Patchstack
- CVSS severity
- HIGH
- CVSS score
- 7.1 / 10
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L- Effective score
- 7.1 / 10 HIGH source: CNA overview
- CWE(s)
-
CWE-79 - Reserved
- 2025-01-16
- Published
- 2025-01-22 15:29 UTC
- Last updated
- 2026-04-28 18:11 UTC
- Source
- https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2025/23xxx/CVE-2025-23578.json
- Linked Threat
- CVE-2025-23578 — Custom CSS Addons <= 1.9.1 - Reflected Cross-Site Scripting
NVD triage scoring NVD CVE 2.0
Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.
- NVD published
- 2025-01-22 15:15:17 UTC
- NVD last modified
- 2026-06-17 08:55:31 UTC
- NVD CVSS v3.1
- 7.1 / 10 HIGH source: audit@patchstack.com
- NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L- Exploitability subscore
- 2.8 / 10
- Impact subscore
- 3.7 / 10
- EPSS score
- 0.0039 (probability of exploitation in next 30 days)
- EPSS percentile
- 31.13% vs all CVEs — higher = more likely to be exploited, as of 2026-07-26
NVD / KEV / EPSS data refreshed 2026-07-27 07:06 UTC. Re-run the 🛰 Backfill from NVD button above to refresh.
European Union Vulnerability Database ENISA EUVD
ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.
- EUVD ID
-
EUVD-2025-3260 - Assigner
- Patchstack
- Published
- Jan 22, 2025, 2:29:14 PM
- Updated
- Apr 28, 2026, 4:11:13 PM
- EUVD base score (CVSS 3.1)
-
7.1 / 10
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L - EUVD-reported EPSS
- 0.3500
- Vendors
- NotFound, Bastien Ho
- Products
-
Custom CSS Addons (0 ≤1.9.1)Custom CSS Addons (n/a ≤1.9.1)
- Aliases
-
GHSA-9pm6-fvgj-xj4x
ENISA description: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Bastien Ho Custom CSS Addons css-addons allows Reflected XSS.This issue affects Custom CSS Addons: from n/a through <= 1.9.1.
Affected products (1)
| Vendor | Product | Versions | Platforms |
|---|---|---|---|
| Bastien Ho | Custom CSS Addons |
0 (affected)
|
— |
Vendor references (1)
References embedded in the original CVE record by the assigning CNA.
MITRE references (1) cveawg.mitre.org
Pulled from MITRE's CVE Services API by the 🛰 Backfill from MITRE button.
Web references (0)
DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.
No web references attached yet.
NVD-tagged references (1)
Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.
Indicators (2)
IOCs linked to the auto-promoted Threat row.
| Type | Value | VirusTotal | Attached |
|---|---|---|---|
| domain |
xss.this
|
no local data | 2026-05-18 21:19 UTC |
| cve |
CVE-2025-23578
|
no local data | 2026-06-06 14:02 UTC |
Remediations (18)
Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.
-
Wordfence remediation: Custom CSS AddonsWordfence
No known patch available. Please review the vulnerability's details in depth and employ mitigations based on your organization's risk tolerance. It may be best to uninstall the affected software and find a replacement.
2026-06-06 14:02 UTC -
web:cisa.gov
Update (08/12/ 2025 ): CISA has updated this alert to provide clarification on identifying Exchange Servers on an organization's networks and provided further guidance on running the Microsoft Exchange Health Checker. Update (08/07/ 2025 ): CISA issued Emergency Directive (ED) 25-02: Mitigate Microsoft Exchange Vulnerability in response to CVE - 2025 -53786
2026-05-22 12:27 UTC -
web:gbhackers.com
Microsoft has released its September 2025 Patch Tuesday update, addressing a total of 81 security vulnerabilities across its product portfolio.
2026-05-22 12:27 UTC -
web:hivepro.com
On August 14, 2025 , Microsoft released its August Patch Tuesday addressing 111 vulnerabilities in Microsoft products and an additional 8 non-Microsoft CVEs , totaling 119 security flaws.
2026-05-22 12:27 UTC -
web:robertsspaceindustries.com
Hi Everyone! Time again for another Hotfix Central thread to keep you all up to date on things going on outside of the normal patch cycle in SC Alpha 4.8 LIVE! This will be a living document of...
2026-05-22 12:27 UTC -
web:msrc.microsoft.com
The Microsoft Security Response Center (MSRC) investigates all reports of security vulnerabilities affecting Microsoft products and services, and provides the information here as part of the ongoing effort to help you manage security risks and help keep your systems protected.
2026-05-22 12:27 UTC -
web:www.oracle.com
This Critical Patch Update contains 374 new security patches across the product families listed below. Please note that an MOS note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at October 2025 Critical Patch Update: Executive Summary and Analysis.
2026-05-22 12:27 UTC -
web:zecurit.com
Get the complete breakdown of Microsoft's May 2026 Patch Tuesday. We analyze the latest security updates and all critical CVEs .
2026-05-22 12:27 UTC -
web:portal.msrc.microsoft.com
The Security Update Guide provides information on the latest Microsoft security updates, helping users understand and address potential vulnerabilities effectively.
2026-05-22 03:02 UTC -
web:blog.qualys.com
Microsoft Patch Tuesday for September 2025 In this month's Patch Tuesday, the September 2025 edition, Microsoft addressed 86 vulnerabilities. The updates include nine critical and 72 important severity vulnerabilities. In this month's updates, Microsoft has addressed two zero-day vulnerabilities that are being publicly disclosed.
2026-05-22 03:02 UTC -
web:source.android.com
Android partners are encouraged to fix all issues in this bulletin and use the latest security patch level. Devices that use the 2025 -11-01 security patch level must include all issues associated with that security patch level, as well as fixes for all issues reported in previous security bulletins.
2026-05-22 03:02 UTC -
web:www.bleepingcomputer.com
Microsoft has released out-of-band (OOB) security updates to patch a critical-severity Windows Server Update Service (WSUS) vulnerability with publicly available proof-of-concept exploit code.
2026-05-22 03:02 UTC -
web:www.computerworld.com
Each month, the team at Readiness analyzes the latest Patch Tuesday updates from Microsoft and provides detailed, actionable testing guidance. The company's Patch Tuesday release for February ...
2026-05-22 03:02 UTC -
web:www.esri.com
Key highlights The ArcGIS Server Security 2025 update 2 is available This patch resolves 10 Medium severity vulnerabilities This security patch is cumulative, and includes fixes provided in the ArcGIS Server Security 2025 update 1.
2026-05-22 03:02 UTC -
web:www.oracle.com
Critical Security Patch Updates Critical Security Patch Updates provide security patches for supported Oracle on-premises products. A Critical Security Patch Update provides targeted, high-priority security fixes in a smaller, more focused format, making them easier to apply with minimal disruption.
2026-05-22 03:02 UTC -
web:isc.sans.edu
Users should prioritize patching these vulnerabilities to prevent unauthorized code execution. Additionally, the Windows Kerberos Elevation of Privilege Vulnerability ( CVE - 2025 -53779), a disclosed zero-day, requires high privileges to exploit but could lead to domain administrator access, necessitating careful monitoring and mitigation .
2026-05-22 03:02 UTC -
web:krebsonsecurity.com
Microsoft Corp. today issued security updates to fix more than 80 vulnerabilities in its Windows operating systems and software. There are no known "zero-day" or actively exploited vulnerabilities ...
2026-05-22 03:02 UTC -
web:cybersecuritynews.com
Microsoft released its final Patch Tuesday updates of 2025 on December 9, addressing 56 security vulnerabilities across Windows, Office, Exchange Server, and other components.
2026-05-22 03:02 UTC
AI Forensic Analysis
Only Available for Registered Users. Sign in to view.
Raw JSON
The full cvelistV5 record. Download as CVE-2025-23578.json.
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2025-23578",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-01-22T16:17:14.977324Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2025-01-22T19:52:29.880Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"collectionURL": "https://wordpress.org/plugins",
"defaultStatus": "unaffected",
"packageName": "css-addons",
"product": "Custom CSS Addons",
"vendor": "Bastien Ho",
"versions": [
{
"lessThanOrEqual": "1.9.1",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "SOPROBRO | Patchstack Bug Bounty Program"
}
],
"datePublic": "2026-04-01T16:32:55.892Z",
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Bastien Ho Custom CSS Addons css-addons allows Reflected XSS.<p>This issue affects Custom CSS Addons: from n/a through <= 1.9.1.</p>"
}
],
"value": "Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Bastien Ho Custom CSS Addons css-addons allows Reflected XSS.This issue affects Custom CSS Addons: from n/a through <= 1.9.1."
}
],
"impacts": [
{
"capecId": "CAPEC-591",
"descriptions": [
{
"lang": "en",
"value": "Reflected XSS"
}
]
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "LOW",
"baseScore": 7.1,
"baseSeverity": "HIGH",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L",
"version": "3.1"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-79",
"description": "Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-04-28T16:11:13.648Z",
"orgId": "21595511-bba5-4825-b968-b78d1f9984a3",
"shortName": "Patchstack"
},
"references": [
{
"tags": [
"vdb-entry"
],
"url": "https://patchstack.com/database/Wordpress/Plugin/css-addons/vulnerability/wordpress-custom-css-addons-plugin-1-9-1-reflected-cross-site-scripting-xss-vulnerability?_s_id=cve"
}
],
"title": "WordPress Custom CSS Addons plugin <= 1.9.1 - Reflected Cross Site Scripting (XSS) vulnerability"
}
},
"cveMetadata": {
"assignerOrgId": "21595511-bba5-4825-b968-b78d1f9984a3",
"assignerShortName": "Patchstack",
"cveId": "CVE-2025-23578",
"datePublished": "2025-01-22T14:29:14.689Z",
"dateReserved": "2025-01-16T11:26:29.091Z",
"dateUpdated": "2026-04-28T16:11:13.648Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}