CVE-2023-48649Network attack vector

Stored XSS via unsanitized uploaded filenames

Published Nov 17, 2023 · Updated Aug 29, 2024

Stored XSS in Concrete CMS before 8.5.13 and 9.x before 9.2.2 allows remote authenticated users to read data through its Admin page. The Admin page renders a stored, attacker-controlled uploaded filename without sanitizing it, causing embedded script to execute in a viewer's browser. Low-privileged upload access and another user's viewing of the page are required, and the CNA assessment limits the consequence to data disclosure.

CVSS severity3.5
Low
EPSS probability0.59%
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 Concrete CMS before 8.5.13 and 9.x before 9.2.2 allows remote authenticated users to read data through its Admin page. The Admin page renders a stored, attacker-controlled uploaded filename without sanitizing it, causing embedded script to execute in a viewer's browser. Low-privileged upload access and another user's viewing of the page are required, and the CNA assessment limits the consequence to data disclosure.

The record

CVE
CVE-2023-48649
Published
Nov 17, 2023
Updated
Aug 29, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 17, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 29, 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

3.5Concrete CMSCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N
5.4NIST NVDCVSS: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 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 exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007JavaScript/JScript

Public exploit references

No public exploit references are available in this record.

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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