CVE-2026-30559Public exploitNetwork attack vector

Administrator session compromise via unsanitized msg reflection

Published Mar 30, 2026 · Updated Mar 30, 2026

Reflected XSS in SourceCodester Sales and Inventory System 1.0 allows remote attackers to execute script through a crafted msg parameter. The add_sales.php page reads the msg value from a GET request and reflects it into HTML without sanitization or output encoding. Exploitation requires an authenticated administrator to follow the crafted URL, after which the script runs in the administrator's browser context and can read page data or issue same-origin requests.

CVSS severity6.1
Medium
EPSS probability0.27%
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 SourceCodester Sales and Inventory System 1.0 allows remote attackers to execute script through a crafted msg parameter. The add_sales.php page reads the msg value from a GET request and reflects it into HTML without sanitization or output encoding. Exploitation requires an authenticated administrator to follow the crafted URL, after which the script runs in the administrator's browser context and can read page data or issue same-origin requests.

The record

CVE
CVE-2026-30559
Published
Mar 30, 2026
Updated
Mar 30, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 30, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 30, 2026Record 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 privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.1CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1204.001User Execution: Malicious Link

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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