How severe is CVE-2023-22278?

CVE-2023-22278 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2023-22278 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-22278?

CVE-2023-22278 affects Daj M-filter. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-22278?

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

When was CVE-2023-22278 published?

CVE-2023-22278 was published on 2023-01-17 and last updated on 2026-06-17.

CVE-2023-22278

CVE-2023-22278 is a medium-severity vulnerability in Daj M-filter with a CVSS 3.x base score of 5.3. 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-287.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 1% (52nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-287
Affected product: Daj M-filter
Published: 2023-01-17
Last modified: 2026-06-17

Description

m-FILTER prior to Ver.5.70R01 (Ver.5 Series) and m-FILTER prior to Ver.4.87R04 (Ver.4 Series) allows a remote unauthenticated attacker to bypass authentication and send users' unintended email when email is being sent under the certain conditions. The attacks exploiting this vulnerability have been observed.

Frequently asked questions

What is CVE-2023-22278?: m-FILTER prior to Ver.5.70R01 (Ver.5 Series) and m-FILTER prior to Ver.4.87R04 (Ver.4 Series) allows a remote unauthenticated attacker to bypass authentication and send users' unintended email when email is being sent under the certain conditions. The attacks exploiting this vulnerability have been observed.
How severe is CVE-2023-22278?: CVE-2023-22278 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2023-22278 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-22278?: CVE-2023-22278 affects Daj M-filter. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-22278?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-22278 published?: CVE-2023-22278 was published on 2023-01-17 and last updated on 2026-06-17.

References

https://jvn.jp/en/jp/JVN55675303/index.html

Affected products (1)

cpe:2.3:a:daj:m-filter:*:*:*:*:*:*:*:*

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