CVE-2020-13756
CRITICAL
9.8
CVSS Score
Published: June 3, 2020 at 01:46 PM UTC
Updated: June 17, 2026 at 02:53 AM UTC
1 product affected across 1 vendorPHP Css Parser
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Severity
CRITICAL9.8
Exploit prediction
EPSS 50%
Description
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.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
v < 8.3.1
Affected range stops below 8.3.1, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
References (5)
x_refsource_MISCExploitThird Party AdvisoryVDB Entry
Source: [email protected]
http://packetstormsecurity.com/files/157923/Sabberworm-PHP-CSS-Code-Injection.htmlx_refsource_MISCExploitMailing ListThird Party Advisory
Source: [email protected]
http://seclists.org/fulldisclosure/2020/Jun/7x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/sabberworm/PHP-CSS-Parser/commit/2ebf59e8bfbf6cfc1653a5f0ed743b95062c62a4x_refsource_MISCRelease NotesThird Party Advisory
Source: [email protected]
https://github.com/sabberworm/PHP-CSS-Parser/releases/tag/8.3.1Source: af854a3a-2127-422b-91ae-364da2661108
https://lists.debian.org/debian-lts-announce/2025/10/msg00013.htmlCVSS
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- HIGH
- Integrity
- HIGH
- Availability
- HIGH
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-94
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