CVE-2023-7054Public exploitNetwork attack vector

Authenticated XSS via malicious PDF upload

Published Dec 22, 2023 · Updated Aug 2, 2024

Unrestricted file upload in PHPGurukul Online Notes Sharing System 1.0 allows remote authenticated users to trigger XSS via /user/add-notes.php. The endpoint accepts a crafted PDF containing JavaScript without sufficient content validation, and the payload executes when a user views the uploaded note. Exploitation requires a valid application login and a victim to open the uploaded file; the demonstrated impact is browser-side script execution and possible session or data theft.

CVSS severity5.5
Medium
EPSS probability0.51%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unrestricted file upload in PHPGurukul Online Notes Sharing System 1.0 allows remote authenticated users to trigger XSS via /user/add-notes.php. The endpoint accepts a crafted PDF containing JavaScript without sufficient content validation, and the payload executes when a user views the uploaded note. Exploitation requires a valid application login and a victim to open the uploaded file; the demonstrated impact is browser-side script execution and possible session or data theft.

The record

CVE
CVE-2023-7054
Published
Dec 22, 2023
Updated
Aug 2, 2024
Vendor
PHPGurukul
Product
Online Notes Sharing System
Classifications
CWE-79, CWE-434, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 22, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 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=1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

PHPGurukul · Online Notes Sharing Systemversion=1.0

Published CVSS scores

5.5VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L
6.5VulDBAV:N/AC:L/Au:S/C:P/I:P/A:P
5.5NVDCVSS:3.1/AV:N/AC:L/PR:L/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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)
CWE-434Unrestricted Upload of File with Dangerous Type
T1190Exploit Public-Facing Application

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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