CVE-2025-66062Network attack vector

Phishing via unvalidated thumbnail redirect URL

Published Nov 21, 2025 · Updated Nov 21, 2025

Open redirect in Optimizing Matters WP YouTube Lyte 1.7.28 and earlier allows remote attackers to send users to phishing sites via a crafted URL. The public lyteCache.php endpoint reads origThumbUrl from the query string and uses it as a 302 Location target when thumbnail caching is unavailable; affected releases do not adequately validate that target. No authentication is required, but an attacker must persuade a user to follow a crafted link; the redirect can support phishing without changing site data.

CVSS severity3.4
Low
EPSS probability0.21%
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 Optimizing Matters WP YouTube Lyte 1.7.28 and earlier allows remote attackers to send users to phishing sites via a crafted URL. The public lyteCache.php endpoint reads origThumbUrl from the query string and uses it as a 302 Location target when thumbnail caching is unavailable; affected releases do not adequately validate that target. No authentication is required, but an attacker must persuade a user to follow a crafted link; the redirect can support phishing without changing site data.

The record

CVE
CVE-2025-66062
Published
Nov 21, 2025
Updated
Nov 21, 2025
Vendor
Optimizing Matters
Product
WP YouTube Lyte
Classifications
CWE-601, CAPEC-98, T1566.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 21, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 21, 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=n/a <=<= 1.7.28 changes=[{"at":"1.7.29","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Optimizing Matters · WP YouTube Lyteversion=n/a <=<= 1.7.28 changes=[{"at":"1.7.29","status":"unaffected"}]

Published CVSS scores

3.7CISA ADPCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
3.4PatchstackCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:N/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 exploitUnconfirmed

Weakness, pattern, technique

CWE-601URL Redirection to Untrusted Site ('Open Redirect')
CAPEC-98Phishing
T1566.002Spearphishing Link

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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