CVE-2023-40013Public exploitNetwork attack vector

Stored XSS via incomplete SVG event filtering

Published Aug 14, 2023 · Updated Oct 2, 2024

Cross-site scripting in Shubham Jain SVG Loader before 1.6.9 allows remote attackers to execute JavaScript via a crafted SVG. The loader's sanitizer removes only a finite list of event attributes before injecting fetched SVG markup, leaving SVG animation events such as onbegin executable. Exposure requires a site to accept an attacker-controlled SVG source or upload; rendering that stored SVG executes script in a viewer's browser context.

CVSS severity7.1
High
EPSS probability0.56%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in Shubham Jain SVG Loader before 1.6.9 allows remote attackers to execute JavaScript via a crafted SVG. The loader's sanitizer removes only a finite list of event attributes before injecting fetched SVG markup, leaving SVG animation events such as onbegin executable. Exposure requires a site to accept an attacker-controlled SVG source or upload; rendering that stored SVG executes script in a viewer's browser context.

The record

CVE
CVE-2023-40013
Published
Aug 14, 2023
Updated
Oct 2, 2024
Vendor
Shubham Jain
Product
SVG Loader
Classifications
CWE-79, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 14, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 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=0 <1.6.9
  2. Affected versionversion=< 1.6.9

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Shubham Jain · SVG Loaderversion=0 <1.6.9; version=< 1.6.9

Published CVSS scores

9.8GitHub Advisory DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
7.1GitHub, Inc. CNACVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:L

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1189Drive-by Compromise

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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