CVE-2020-17952

Code injection in topthink/think

9.8 Critical

A remote code execution (RCE) vulnerability in /library/think/App.php of Twothink v2.0 allows attackers to execute arbitrary PHP code.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

2.47%Up 1.6 points since Jul 27, 2021

What each source reports

NVD Score used 9.8

A remote code execution (RCE) vulnerability in /library/think/App.php of Twothink v2.0 allows attackers to execute arbitrary PHP code.

Record: CVE-2020-17952
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0: 7.5 HighAV:N/AC:L/Au:N/C:P/I:P/A:P
Updated: 2026-11-02

CVE List No score

A remote code execution (RCE) vulnerability in /library/think/App.php of Twothink v2.0 allows attackers to execute arbitrary PHP code.

Record: CVE-2020-17952
Updated: 2026-11-02

EUVDEUVD-2021-1681 No score

A remote code execution (RCE) vulnerability in /library/think/App.php of Twothink v2.0 allows attackers to execute arbitrary PHP code.

Record: EUVD-2021-1681
Updated: 2026-11-03

GitHub AdvisoriesGHSA-ch3r-vp46-8g22 9.8

Code injection in topthink/think

A remote code execution (RCE) vulnerability in /library/think/App.php of Twothink v2.0 allows attackers to execute arbitrary PHP code.

Record: GHSA-ch3r-vp46-8g22
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-74
Updated: 2026-11-02

OSVGHSA-ch3r-vp46-8g22 9.8

Code injection in topthink/think

A remote code execution (RCE) vulnerability in /library/think/App.php of Twothink v2.0 allows attackers to execute arbitrary PHP code.

Record: GHSA-ch3r-vp46-8g22
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-74
Updated: 2026-11-02

Affected products

twothink project twothink

Affected packages

Affected packages
Package	Affected	Fixed
`topthink/think` Packagist	through 6.0.9	None known
`topthink/think` Packagist	through 6.0.9, plus listed versions 5.05.0-rc15.0-rc2v5.0.1v5.0.10 Show 45 moreShow less v5.0.11v5.0.12v5.0.13v5.0.14v5.0.15v5.0.16v5.0.18v5.0.19v5.0.2v5.0.20v5.0.22v5.0.23v5.0.24v5.0.3v5.0.4v5.0.5v5.0.6v5.0.7v5.0.8v5.0.9v5.1-beta.1v5.1-rc.3v5.1.0v5.1.10v5.1.11v5.1.12v5.1.13v5.1.14v5.1.15v5.1.16v5.1.17v5.1.19v5.1.20v5.1.21v5.1.22v5.1.23v5.1.24v5.1.25v5.1.26v5.1.27v5.1.28v5.1.29v5.1.31v5.1.32v5.1.34	None known

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2020-17952 is a critical vulnerability (CVSS 9.8) in Twothink Project Twothink, published July 26, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.47%, the 84th percentile. No source names a fixed version.

References

This page doesn't list everything

Left out here: 22 versions. The JSON record has them.