CVE-2023-3771Public exploitNetwork attack vector

Unauthenticated user redirection via unvalidated url_js parameter

Published Jan 16, 2024 · Updated Jun 20, 2025

Open redirect in the T1 WordPress theme 19.0 and earlier allows remote attackers to redirect users via a crafted application URL. The apply_redirection.php page uses the attacker-controlled url_js parameter as a redirect destination without validating that the target is trusted. Exploitation requires a user to follow the crafted link, after which the browser is sent to an arbitrary external site.

CVSS severity6.1
Medium
EPSS probability0.53%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Open redirect in the T1 WordPress theme 19.0 and earlier allows remote attackers to redirect users via a crafted application URL. The apply_redirection.php page uses the attacker-controlled url_js parameter as a redirect destination without validating that the target is trusted. Exploitation requires a user to follow the crafted link, after which the browser is sent to an arbitrary external site.

The record

CVE
CVE-2023-3771
Published
Jan 16, 2024
Updated
Jun 20, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-601, T1566.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 16, 2024CVE publishedPublication date reported by the CVE source.
  2. Jun 20, 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

4.3WordfenceCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
6.1CISA-ADPCVSS: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.

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-601URL Redirection to Untrusted Site ('Open Redirect')
T1566.002Spearphishing 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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