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Cross-Site Scripting in SVG Sanitizer

Moderate severity GitHub Reviewed Published May 12, 2020 in TYPO3GmbH/svg_sanitizer • Updated Jan 9, 2023

Package

composer t3g/svg-sanitizer (Composer)

Affected versions

< 1.0.3

Patched versions

1.0.3

Description

Slightly invalid or incomplete SVG markup is not correctly processed and thus not sanitized at all. Albeit the markup is not valid it still is evaluated in browsers and leads to cross-site scripting.

An updated version 1.0.3 is available from the TYPo3 extension manager and at https://extensions.typo3.org/extension/download/svg_sanitizer/1.0.3/zip/
Users of the extension are advised to update the extension as soon as possible.

References

@NeoBlack NeoBlack published to TYPO3GmbH/svg_sanitizer May 12, 2020
Reviewed May 13, 2020
Published to the GitHub Advisory Database May 13, 2020
Last updated Jan 9, 2023

Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

EPSS score

0.050%
(21st percentile)

Weaknesses

CVE ID

CVE-2020-11070

GHSA ID

GHSA-59cf-m7v5-wh5w

Source code

No known source code

Credits

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