CVE-2023-0535Public exploitNetwork attack vector

Stored XSS via unescaped shortcode attributes

Published Feb 27, 2023 · Updated Mar 10, 2025

Stored XSS in Donation Block For PayPal before 2.1.0 allows remote authenticated users to inject scripts through shortcode attributes. The size attribute is inserted into rendered page HTML without validation or output escaping, so event-handler markup remains executable. Contributor-level publishing access and a visitor who opens the crafted page are required; the injected script runs in that visitor's browser context.

CVSS severity5.4
Medium
EPSS probability0.47%
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 Donation Block For PayPal before 2.1.0 allows remote authenticated users to inject scripts through shortcode attributes. The size attribute is inserted into rendered page HTML without validation or output escaping, so event-handler markup remains executable. Contributor-level publishing access and a visitor who opens the crafted page are required; the injected script runs in that visitor's browser context.

The record

CVE
CVE-2023-0535
Published
Feb 27, 2023
Updated
Mar 10, 2025
Vendor
Bharat Kambariya
Product
Donation Block For PayPal
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 27, 2023CVE publishedPublication date reported by the CVE source.
  2. Mar 10, 2025Record 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 <2.1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Bharat Kambariya · Donation Block For PayPalversion=0 <2.1.0

Published CVSS scores

6.4WordfenceCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
5.4CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:R/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.

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

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Cross-Site Scripting (XSS)
T1059.007JavaScript/JScript

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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