CVE-2021-34660Public exploitNetwork attack vector

Administrator-session script execution via unescaped startdate

Published Aug 9, 2021 · Updated May 23, 2025

Reflected XSS in WP Fusion Lite 3.37.18 and earlier allows remote attackers to execute scripts through a crafted startdate parameter. The logging table list places the request value into the WordPress administrator log-filter page without adequate output escaping. Exploitation requires a logged-in administrator to follow a crafted link, after which the script runs in that administrator's browser context.

CVSS severity6.1
Medium
EPSS probability0.82%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in WP Fusion Lite 3.37.18 and earlier allows remote attackers to execute scripts through a crafted startdate parameter. The logging table list places the request value into the WordPress administrator log-filter page without adequate output escaping. Exploitation requires a logged-in administrator to follow a crafted link, after which the script runs in that administrator's browser context.

The record

CVE
CVE-2021-34660
Published
Aug 9, 2021
Updated
May 23, 2025
Vendor
Jack Arturo
Product
WP Fusion Lite
Classifications
CWE-79, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 9, 2021CVE publishedPublication date reported by the CVE source.
  2. May 23, 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=3.37.18 <=3.37.18

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Jack Arturo · WP Fusion Liteversion=3.37.18 <=3.37.18

Published CVSS scores

6.1WordfenceCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
4.3NVDAV:N/AC:M/Au:N/C:N/I:P/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1204.001Malicious Link

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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