CVE-2023-4309: Election Services Co. (ESC) Internet Election Service is vulnerable to SQL injection in multiple pages and parameters. These vulnerabilities allow an ...

Description

Election Services Co. (ESC) Internet Election Service is vulnerable to SQL injection in multiple pages and parameters. These vulnerabilities allow an unauthenticated, remote attacker to read or modify data for any elections that share the same backend database. ESC deactivated older and unused elections and enabled web application firewall (WAF) protection for current and future elections on or around 2023-08-12.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

1.05%

60.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Electionservicesco	Internet Election Service	All versions

References

Timeline

Published: Oct 10, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-4309?

Election Services Co. (ESC) Internet Election Service is vulnerable to SQL injection in multiple pages and parameters. These vulnerabilities allow an unauthenticated, remote attacker to read or modify data for any elections that share the same backend database. ESC deactivated older and unused elections and enabled web application firewall (WAF) protection for current and future elections on or around 2023-08-12.

How severe is CVE-2023-4309?

CVE-2023-4309 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.05% probability of exploitation in the next 30 days.

How do I fix CVE-2023-4309?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.