CVE-2021-38361Network attack vector

Reflected XSS via unescaped link parameter

Published Dec 14, 2021 · Updated Feb 14, 2025

Reflected XSS in .htaccess Redirect 0.3.1 and earlier allows remote attackers to inject scripts through the link parameter. The htaccess-redirect.php page returns the untrusted link value without the output neutralization required to prevent script execution. Exploitation requires an unauthenticated attacker to persuade a victim to open a crafted URL, enabling script execution in the victim's browser context.

CVSS severity6.1
Medium
EPSS probability0.76%
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 .htaccess Redirect 0.3.1 and earlier allows remote attackers to inject scripts through the link parameter. The htaccess-redirect.php page returns the untrusted link value without the output neutralization required to prevent script execution. Exploitation requires an unauthenticated attacker to persuade a victim to open a crafted URL, enabling script execution in the victim's browser context.

The record

CVE
CVE-2021-38361
Published
Dec 14, 2021
Updated
Feb 14, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 14, 2021CVE publishedPublication date reported by the CVE source.
  2. Feb 14, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

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.

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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.

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Technologies

Your stack

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Your stack

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