CVE-2021-34628Public exploitNetwork attack vector

Stored XSS via forged loginbgSave requests

Published Aug 2, 2021 · Updated Sep 16, 2024

Stored XSS in Weblizar Admin Custom Login 3.2.7 and earlier allows remote attackers to inject scripts through a forged admin request. The loginbgSave handler stores attacker-controlled login-page text fields without CSRF nonce validation or adequate output escaping. Exploitation requires a logged-in administrator to submit the crafted form, after which the stored script runs on the customized login page.

CVSS severity8.8
High
EPSS probability0.70%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Weblizar Admin Custom Login 3.2.7 and earlier allows remote attackers to inject scripts through a forged admin request. The loginbgSave handler stores attacker-controlled login-page text fields without CSRF nonce validation or adequate output escaping. Exploitation requires a logged-in administrator to submit the crafted form, after which the stored script runs on the customized login page.

The record

CVE
CVE-2021-34628
Published
Aug 2, 2021
Updated
Sep 16, 2024
Vendor
Weblizar
Product
Admin Custom Login
Classifications
CWE-352
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 2, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3.2.7 <=3.2.7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Weblizar · Admin Custom Loginversion=3.2.7 <=3.2.7

Published CVSS scores

8.8NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
8.8WordfenceCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
6.8NVDAV:N/AC:M/Au:N/C:P/I:P/A:P

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 exploitPublished

Weakness, pattern, technique

CWE-352Cross-Site Request Forgery (CSRF)

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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