CVE-2023-34944Network attack vector

Browser code execution via unsanitized SVG upload

Published Jun 13, 2023 · Updated Jul 9, 2026

Unrestricted SVG upload in Chamilo LMS 1.11.0 through 1.11.18 allows remote attackers to execute browser code through a crafted image. The handle_uploaded_document paths in fileUpload.lib.php move SVG documents into storage without sanitizing embedded active content. Execution occurs when the stored SVG is rendered, limiting the direct consequence to code running in the viewer's browser context.

CVSS severity9.8
Critical
EPSS probability1.07%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unrestricted SVG upload in Chamilo LMS 1.11.0 through 1.11.18 allows remote attackers to execute browser code through a crafted image. The handle_uploaded_document paths in fileUpload.lib.php move SVG documents into storage without sanitizing embedded active content. Execution occurs when the stored SVG is rendered, limiting the direct consequence to code running in the viewer's browser context.

The record

CVE
CVE-2023-34944
Published
Jun 13, 2023
Updated
Jul 9, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-434, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 13, 2023CVE publishedPublication date reported by the CVE source.
  2. Jul 9, 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

9.8NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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

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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