CVE-2021-38335Network attack vector

Arbitrary script execution via reflected PHP_SELF

Published Sep 10, 2021 · Updated May 2, 2025

Reflected cross-site scripting in Wise Agent Lead Forms 1.0 and earlier allows remote attackers to execute arbitrary web scripts via crafted requests. WiseAgentCaptureForm.php reflects the $_SERVER["PHP_SELF"] value into generated HTML without output encoding, allowing attacker-controlled markup to execute in a browser. Exploitation requires a victim to load a crafted URL; the consequence is script execution in that browser with potential data access or actions available to the victim session, not server-side code execution.

CVSS severity6.1
Medium
EPSS probability0.90%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected cross-site scripting in Wise Agent Lead Forms 1.0 and earlier allows remote attackers to execute arbitrary web scripts via crafted requests. WiseAgentCaptureForm.php reflects the $_SERVER["PHP_SELF"] value into generated HTML without output encoding, allowing attacker-controlled markup to execute in a browser. Exploitation requires a victim to load a crafted URL; the consequence is script execution in that browser with potential data access or actions available to the victim session, not server-side code execution.

The record

CVE
CVE-2021-38335
Published
Sep 10, 2021
Updated
May 2, 2025
Vendor
Wise Agent
Product
Wise Agent Lead Forms
Classifications
CWE-79, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 10, 2021CVE publishedPublication date reported by the CVE source.
  2. May 2, 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=1.0 <=1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Wise Agent · Wise Agent Lead Formsversion=1.0 <=1.0

Published CVSS scores

6.1WordfenceCVSS:3.1/AV:N/AC:L/PR:N/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.

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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 exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1189Drive-by Compromise

Public exploit references

No public exploit references are available in this record.

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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