CVE-2022-23515Public exploitNetwork attack vector

Cross-site scripting via safelisted SVG data URIs

Published Dec 14, 2022 · Updated Nov 3, 2025

Cross-site scripting in Loofah 2.1.0 through 2.19.0 allows remote attackers to inject browser-executed content through SVG data URIs. The HTML5 safelist treats image/svg+xml as an allowed data-URI media type, so sanitizer output retains an SVG use href containing attacker-controlled SVG. A consuming application must sanitize and republish attacker-controlled markup, and a user must render the resulting content for script execution.

CVSS severity6.1
Medium
EPSS probability0.79%
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 Loofah 2.1.0 through 2.19.0 allows remote attackers to inject browser-executed content through SVG data URIs. The HTML5 safelist treats image/svg+xml as an allowed data-URI media type, so sanitizer output retains an SVG use href containing attacker-controlled SVG. A consuming application must sanitize and republish attacker-controlled markup, and a user must render the resulting content for script execution.

The record

CVE
CVE-2022-23515
Published
Dec 14, 2022
Updated
Nov 3, 2025
Vendor
flavorjones
Product
Loofah
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 14, 2022CVE publishedPublication date reported by the CVE source.
  2. Nov 3, 2025Record 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=>= 2.1.0, < 2.19.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

flavorjones · Loofahversion=>= 2.1.0, < 2.19.1

Published CVSS scores

6.1GitHubCVSS: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.

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 exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

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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