CVE-2020-10403Public exploitNetwork attack vector

Authenticated script execution via unencoded URI reflection

Published Mar 12, 2020 · Updated Aug 4, 2024

Reflected XSS in admin/header.php in Chadha PHPKB Standard Multi-Language 9 allows remote authenticated users to execute script via a crafted URI. The header prints the final URI segment, including its query string, into an onclick attribute without validation or output encoding. Superuser, Editor, or Writer access and interaction with the crafted admin/edit-comment.php URL are required; script runs in the victim's browser.

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 admin/header.php in Chadha PHPKB Standard Multi-Language 9 allows remote authenticated users to execute script via a crafted URI. The header prints the final URI segment, including its query string, into an onclick attribute without validation or output encoding. Superuser, Editor, or Writer access and interaction with the crafted admin/edit-comment.php URL are required; script runs in the victim's browser.

The record

CVE
CVE-2020-10403
Published
Mar 12, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1203
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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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')
T1203Exploitation for Client Execution

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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