CVE-2021-27352Public exploitNetwork attack vector

Post-login redirect via unvalidated destination parameter

Published Mar 29, 2021 · Updated Aug 3, 2024

Open redirect in Ilch CMS 2.1.42 allows remote authenticated users to send users to an attacker-controlled site after login. The login form accepts login_redirect_url from the POST body and uses the supplied external URL as the post-authentication destination without restricting its origin. A valid login and user interaction are required; successful exploitation enables phishing or credential capture on the destination site.

CVSS severity5.4
Medium
EPSS probability0.83%
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 Ilch CMS 2.1.42 allows remote authenticated users to send users to an attacker-controlled site after login. The login form accepts login_redirect_url from the POST body and uses the supplied external URL as the post-authentication destination without restricting its origin. A valid login and user interaction are required; successful exploitation enables phishing or credential capture on the destination site.

The record

CVE
CVE-2021-27352
Published
Mar 29, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-601
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 29, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record 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 privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.4NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
4.9NVDAV:N/AC:M/Au:S/C:P/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-601URL Redirection to Untrusted Site ('Open Redirect')

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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