How severe is CVE-2022-23993?

CVE-2022-23993 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2022-23993 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-23993?

CVE-2022-23993 primarily affects Pfsense. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2022-23993?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2022-23993 published?

CVE-2022-23993 was published on 2022-01-26 and last updated on 2026-06-17.

CVE-2022-23993

CVE-2022-23993 is a medium-severity vulnerability in Pfsense with a CVSS 3.x base score of 6.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v2: 4.3
EPSS exploit prediction: 2% (72nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Pfsense
Published: 2022-01-26
Last modified: 2026-06-17

Description

/usr/local/www/pkg.php in pfSense CE before 2.6.0 and pfSense Plus before 22.01 uses $_REQUEST['pkg_filter'] in a PHP echo call, causing XSS.

Frequently asked questions

What is CVE-2022-23993?: /usr/local/www/pkg.php in pfSense CE before 2.6.0 and pfSense Plus before 22.01 uses $_REQUEST['pkg_filter'] in a PHP echo call, causing XSS.
How severe is CVE-2022-23993?: CVE-2022-23993 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2022-23993 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-23993?: CVE-2022-23993 primarily affects Pfsense. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2022-23993?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2022-23993 published?: CVE-2022-23993 was published on 2022-01-26 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:a:pfsense:pfsense:*:*:*:*:*:*:*:*
cpe:2.3:a:pfsense:pfsense_plus:*:*:*:*:*:*:*:*

More vulnerabilities in Pfsense

CVE-2025-69691 — Critical (CVSS 9.9): Netgate pfSense CE 2.8.0 allows code execution in the XMLRPC API via pfsense.exec_php. NOTE: the Supplier disputes this…
CVE-2023-29974 — Critical (CVSS 9.8): An issue discovered in Pfsense CE version 2.6.0 allows attackers to compromise user accounts via weak password…
CVE-2023-27100 — Critical (CVSS 9.8): Improper restriction of excessive authentication attempts in the SSHGuard component of Netgate pfSense Plus software…
CVE-2025-69690 — Critical (CVSS 9.1): Netgate pfSense CE 2.7.2 allows code execution by using the module installer with a backup file with a serialized PHP…
CVE-2021-41282 — High (CVSS 8.8): diag_routes.php in pfSense 2.5.2 allows sed data injection. Authenticated users are intended to be able to view data…
CVE-2016-10709 — High (CVSS 8.8): pfSense before 2.3 allows remote authenticated users to execute arbitrary OS commands via a '|' character in the…

All CVEs affecting Pfsense →

Other CWE-79 (Cross-site Scripting (XSS)) vulnerabilities

CVE-2025-49410 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Imran Emu TC…
CVE-2024-47875 — Critical (CVSS 10.0): DOMPurify is a DOM-only, super-fast, uber-tolerant XSS sanitizer for HTML, MathML and SVG. DOMpurify was vulnerable to…
CVE-2024-6886 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Gitea…
CVE-2023-45144 — Critical (CVSS 10.0): com.xwiki.identity-oauth:identity-oauth-ui is a package to aid in building identity and service providers based on…
CVE-2023-45138 — Critical (CVSS 10.0): Change Request is an pplication allowing users to request changes on a wiki without publishing the changes directly.…
CVE-2022-4361 — Critical (CVSS 10.0): Keycloak, an open-source identity and access management solution, has a cross-site scripting (XSS) vulnerability in the…

Browse all CWE-79 (Cross-site Scripting (XSS)) vulnerabilities →