How severe is CVE-2022-48521?

CVE-2022-48521 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-2022-48521 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-48521?

CVE-2022-48521 primarily affects Opendkim. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2022-48521?

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

When was CVE-2022-48521 published?

CVE-2022-48521 was published on 2023-07-11 and last updated on 2026-06-17.

CVE-2022-48521

CVE-2022-48521 is a medium-severity vulnerability in Opendkim 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.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 1% (43rd percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Opendkim
Published: 2023-07-11
Last modified: 2026-06-17

Description

An issue was discovered in OpenDKIM through 2.10.3, and 2.11.x through 2.11.0-Beta2. It fails to keep track of ordinal numbers when removing fake Authentication-Results header fields, which allows a remote attacker to craft an e-mail message with a fake sender address such that programs that rely on Authentication-Results from OpenDKIM will treat the message as having a valid DKIM signature when in fact it has none.

Frequently asked questions

What is CVE-2022-48521?: An issue was discovered in OpenDKIM through 2.10.3, and 2.11.x through 2.11.0-Beta2. It fails to keep track of ordinal numbers when removing fake Authentication-Results header fields, which allows a remote attacker to craft an e-mail message with a fake sender address such that programs that rely on Authentication-Results from OpenDKIM will treat the message as having a valid DKIM signature when in fact it has none.
How severe is CVE-2022-48521?: CVE-2022-48521 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-2022-48521 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-48521?: CVE-2022-48521 primarily affects Opendkim. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2022-48521?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2022-48521 published?: CVE-2022-48521 was published on 2023-07-11 and last updated on 2026-06-17.

References

Affected products (4)

cpe:2.3:a:opendkim:opendkim:*:*:*:*:*:*:*:*
cpe:2.3:a:opendkim:opendkim:2.11.0:beta0:*:*:*:*:*:*
cpe:2.3:a:opendkim:opendkim:2.11.0:beta1:*:*:*:*:*:*
cpe:2.3:a:opendkim:opendkim:2.11.0:beta2:*:*:*:*:*:*

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