CVE-2023-0375Public exploitNetwork attack vector

Stored XSS via unescaped block CSS classes

Published Feb 21, 2023 · Updated Mar 12, 2025

Stored XSS in Bootstrapped Ventures Easy Affiliate Links before 3.7.1 allows remote authenticated users to inject scripts via block settings. The Easy Affiliate Link Gutenberg block copies the Additional CSS class option into page output without validating or escaping the supplied value. Contributor-level access and an existing affiliate link are required; the script runs when a user visits the crafted post or page, exposing that user's browser session to attacker-controlled actions.

CVSS severity5.4
Medium
EPSS probability0.70%
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 Bootstrapped Ventures Easy Affiliate Links before 3.7.1 allows remote authenticated users to inject scripts via block settings. The Easy Affiliate Link Gutenberg block copies the Additional CSS class option into page output without validating or escaping the supplied value. Contributor-level access and an existing affiliate link are required; the script runs when a user visits the crafted post or page, exposing that user's browser session to attacker-controlled actions.

The record

CVE
CVE-2023-0375
Published
Feb 21, 2023
Updated
Mar 12, 2025
Vendor
Bootstrapped Ventures
Product
Easy Affiliate Links
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 21, 2023CVE publishedPublication date reported by the CVE source.
  2. Mar 12, 2025Record 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 <3.7.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Bootstrapped Ventures · Easy Affiliate Linksversion=0 <3.7.1

Published CVSS scores

5.4WordfenceCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
5.4NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
6.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H

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 exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007Command and Scripting Interpreter: JavaScript

Public exploit references

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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