How severe is CVE-2022-28380?

CVE-2022-28380 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2022-28380 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (71st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-28380?

CVE-2022-28380 affects Rc-httpd Project Rc-httpd. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2022-28380?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2022-28380 published?

CVE-2022-28380 was published on 2022-04-03 and last updated on 2026-06-17.

CVE-2022-28380

CVE-2022-28380 is a high-severity vulnerability in Rc-httpd Project Rc-httpd with a CVSS 3.x base score of 7.5. 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-22.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (71st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-22
Affected product: Rc-httpd Project Rc-httpd
Published: 2022-04-03
Last modified: 2026-06-17

Description

The rc-httpd component through 2022-03-31 for 9front (Plan 9 fork) allows ..%2f directory traversal if serve-static is used.

Frequently asked questions

What is CVE-2022-28380?: The rc-httpd component through 2022-03-31 for 9front (Plan 9 fork) allows ..%2f directory traversal if serve-static is used.
How severe is CVE-2022-28380?: CVE-2022-28380 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2022-28380 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (71st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-28380?: CVE-2022-28380 affects Rc-httpd Project Rc-httpd. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2022-28380?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2022-28380 published?: CVE-2022-28380 was published on 2022-04-03 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:rc-httpd_project:rc-httpd:*:*:*:*:*:9front:*:*

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