CVE-2020-13756

Publication date 3 June 2020

Last updated 7 May 2025

Ubuntu priority

Cvss 3 Severity Score

Sabberworm PHP CSS Parser before 8.3.1 calls eval on uncontrolled data, possibly leading to remote code execution if the function allSelectors() or getSelectorsBySpecificity() is called with input from an attacker.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
php-horde-css-parser	25.04 plucky	Not in release
	24.10 oracular	Not in release
	24.04 LTS noble	Not in release
	22.04 LTS jammy	Not in release
	20.04 LTS focal	Not in release
	18.04 LTS bionic	Fixed 1.0.11-1ubuntu1+esm1 Ubuntu Pro
	16.04 LTS xenial	Fixed 1.0.8-1ubuntu1+esm1 Ubuntu Pro

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Notes

juliaphoebe

Patch comes from the CSS parser that this bundles. So upstream fix is still needed.

Severity score breakdown

Parameter	Value
Base score	9.8 · Critical
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	High
Integrity impact	High
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

Related Ubuntu Security Notices (USN)

USN-7502-1
Horde Css Parser vulnerability
7 May 2025