# CVE-2018-20062: NoneCms - RCE

> Live exploitation tracking for CVE-2018-20062 by the CrowdSec Live Exploit Tracker, built from real-world attack data crowdsourced from CrowdSec's global network.

Page: https://tracker.crowdsec.net/cves/CVE-2018-20062

## Key facts

- **Exploitation phase:** Background Noise. Continuous low-level scanning or exploitation attempts are observed, mostly opportunistic and automated.
- **CVSS score:** 9.8
- **Public exploit available:** Yes
- **Affected products:** 5none NoneCms
- **Weaknesses:** CWE-20 (Improper Input Validation)
- **Tags:** cms

## Description

An issue was discovered in NoneCms V1.3. thinkphp/library/think/App.php allows remote attackers to execute arbitrary PHP code via crafted use of the filter parameter, as demonstrated by the s=index/\think\Request/input&filter=phpinfo&data=1 query string.

## CrowdSec analysis

[CVE-2018-20062](https://euvd.enisa.europa.eu/vulnerability/CVE-2018-20062) is a critical vulnerability in NoneCms that allows remote attackers to execute arbitrary PHP code through improper input handling in the application logic.

CrowdSec has been tracking this vulnerability and its exploits since 10th of December 2021.

Based on data from the CrowdSec network, nearly all observed exploitation of CVE-2018-20062 is fully opportunistic, with attackers indiscriminately scanning the entire internet. These attacks are automated and lack any form of target selection or reconnaissance.
CrowdSec network telemetry also shows that exploitation of CVE-2018-20062 has significantly declined over the past week. Attack volumes are well below the long-term average, suggesting attackers are rapidly losing interest. The vulnerability appears to be falling out of active use across most threat landscapes.

Observed exploitation attempts target application endpoints that improperly process user-supplied parameters in backend PHP scripts.

## Timeline

- 2018-12-11: CVE Published. CVE-2018-20062 is published to NVD.
- 2021-11-03: CISA KEV. CVE-2018-20062 is added to the Known Exploited Vulnerabilities catalog by CISA.
- 2021-12-10: Rule Released. CrowdSec releases a rule to detect CVE-2018-20062 exploitation attempts against the CrowdSec Network.
- 2021-12-10: CrowdSec First Seen. CrowdSec observes in-the-wild exploitation of CVE-2018-20062 for the first time.
- 2022-05-03: CISA Remediation Deadline. Expiration of the CISA remediation deadline as described in [BOD 22-01](https://www.cisa.gov/news-events/directives/bod-22-01-reducing-significant-risk-known-exploited-vulnerabilities).

## References

- https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2018/CVE-2018-20062.yaml

## Live exploitation data

The [Live Exploit Tracker page](https://tracker.crowdsec.net/cves/CVE-2018-20062) follows observed exploitation activity for CVE-2018-20062. [Request an API key](https://tracker.crowdsec.net/request-api-key) for full access to its exploitation timeline, attacking IP addresses and blocklists.