CVE-2020-10421Public exploitNetwork attack vector

Reflected XSS via unescaped URI handling

Published Mar 12, 2020 · Updated Aug 4, 2024

Reflected XSS in Chadha PHPKB Standard Multi-Language 9 allows remote authenticated users to run script in admin/manage-departments.php via crafted URI. The admin/header.php component incorporates a question-mark suffix and payload into generated pages without neutralizing script-capable characters. Exploitation requires an authenticated administrator to induce a victim browser request, enabling script execution in that browser context with confidentiality and integrity impact but no direct server availability impact.

CVSS severity4.8
Medium
EPSS probability0.61%
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 Chadha PHPKB Standard Multi-Language 9 allows remote authenticated users to run script in admin/manage-departments.php via crafted URI. The admin/header.php component incorporates a question-mark suffix and payload into generated pages without neutralizing script-capable characters. Exploitation requires an authenticated administrator to induce a victim browser request, enabling script execution in that browser context with confidentiality and integrity impact but no direct server availability impact.

The record

CVE
CVE-2020-10421
Published
Mar 12, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1189
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 12, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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

4.8NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
3.5NVDAV:N/AC:M/Au:S/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1189Drive-by Compromise

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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