CVE-2020-13756
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.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 49.8%, higher than 99% of all known CVEs. Patch or mitigate before the next change window.
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.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 49.80% probability · 99th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-94
- Affected
- sabberworm/php css parser
- Source
- cve@mitre.org
EPSS 49.8% since 26 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://packetstormsecurity.com/files/157923/Sabberworm-PHP-CSS-Code-Injection.htmlExploit, Third Party Advisory, VDB Entry
- http://seclists.org/fulldisclosure/2020/Jun/7Exploit, Mailing List, Third Party Advisory
- https://github.com/sabberworm/PHP-CSS-Parser/commit/2ebf59e8bfbf6cfc1653a5f0ed743b95062c62a4Patch, Third Party Advisory
- https://github.com/sabberworm/PHP-CSS-Parser/releases/tag/8.3.1Release Notes, Third Party Advisory
- http://packetstormsecurity.com/files/157923/Sabberworm-PHP-CSS-Code-Injection.htmlExploit, Third Party Advisory, VDB Entry
- http://seclists.org/fulldisclosure/2020/Jun/7Exploit, Mailing List, Third Party Advisory
- https://github.com/sabberworm/PHP-CSS-Parser/commit/2ebf59e8bfbf6cfc1653a5f0ed743b95062c62a4Patch, Third Party Advisory
- https://github.com/sabberworm/PHP-CSS-Parser/releases/tag/8.3.1Release Notes, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2025/10/msg00013.html
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.