CVE-2021-47860

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.27% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 19.8% of scored records. A rank, not a probability.

NVD base score

8.5 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

NVD analysis status

Analyzed. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-01-21 17:29Z9 MO AGO

Last updated

2026-04-07 14:06Z6 MO AGO

Reserved

2026-01-18

Assigning CNA

VulnCheck

Record state

PUBLISHED

Severity

High (CVSS 8.5)

CNA CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

Weaknesses

• CWE-352Cross-Site Request Forgery (CSRF)Compound

Data version

5.2

Document digest

7aa5146cee0a7b8c4b40a1c28ba924d0dc064150563888441b35dedd32623a75

• www.exploit-db.comExploitDB-49816https://www.exploit-db.com/exploits/49816exploit
• get-simple.infoVendor Homepagehttp://get-simple.infoproduct
• github.comGetSimple CMS GitHub Repositoryhttps://github.com/GetSimpleCMS/GetSimpleCMSproduct
• github.comResearcher Disclosurehttps://github.com/boku7/gsCMS-CustomJS-Csrf2Xss2Rcetechnical-descriptionexploit
• www.exploit-db.comExploitDB-49712https://www.exploit-db.com/exploits/49712exploit
• www.vulncheck.comVulnCheck Advisory: GetSimple CMS Custom JS 0.1 - CSRF to XSS to RCEhttps://www.vulncheck.com/advisories/getsimple-cms-custom-js-csrf-to-xss-to-rcethird-party-advisory