CVE-2021-47966

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 19.0% of scored records. A rank, not a probability.

NVD base score

8.8 (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:N/VC:H/VI:L/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

Deferred. 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

2026-05-15 18:36Z5 MO AGO

Last updated

2026-05-15 22:22Z5 MO AGO

Reserved

2026-05-15

Assigning CNA

VulnCheck

Record state

PUBLISHED

Severity

High (CVSS 8.8)

CNA CVSS vector

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

Weaknesses

• CWE-89Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')Base

Data version

5.2

Document digest

294d9206a200c10fb6fb09a147de0939df2784543accc08dd01c093a47796b6a

• www.exploit-db.comExploitDB-49849https://www.exploit-db.com/exploits/49849exploit
• timeclock.sourceforge.netOfficial Product Homepagehttp://timeclock.sourceforge.netproduct
• sourceforge.netProduct Referencehttps://sourceforge.net/projects/timeclock/files/PHP%20Timeclock/PHP%20Timeclock%201.04/product
• www.vulncheck.comVulnCheck Advisory: PHP Timeclock 1.04 SQL Injection via login.phphttps://www.vulncheck.com/advisories/php-timeclock-sql-injection-via-login-phpthird-party-advisory