How severe is CVE-2021-3005?

CVE-2021-3005 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2021-3005 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-3005?

CVE-2021-3005 affects Mk-auth. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-3005?

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

When was CVE-2021-3005 published?

CVE-2021-3005 was published on 2021-01-03 and last updated on 2026-06-17.

CVE-2021-3005

CVE-2021-3005 is a medium-severity vulnerability in Mk-auth with a CVSS 3.x base score of 4.3. 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 4.3)
CVSS v2: 4.0
EPSS exploit prediction: 1% (54th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Mk-auth
Published: 2021-01-03
Last modified: 2026-06-17

Description

MK-AUTH through 19.01 K4.9 allows remote attackers to obtain sensitive information (e.g., a CPF number) via a modified titulo (aka invoice number) value to the central/recibo.php URI.

Frequently asked questions

What is CVE-2021-3005?: MK-AUTH through 19.01 K4.9 allows remote attackers to obtain sensitive information (e.g., a CPF number) via a modified titulo (aka invoice number) value to the central/recibo.php URI.
How severe is CVE-2021-3005?: CVE-2021-3005 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2021-3005 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-3005?: CVE-2021-3005 affects Mk-auth. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-3005?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-3005 published?: CVE-2021-3005 was published on 2021-01-03 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:mk-auth:mk-auth:*:*:*:*:*:*:*:*

More vulnerabilities in Mk-auth

CVE-2020-14072 — Critical (CVSS 9.8): An issue was discovered in MK-AUTH 19.01. It allows command execution as root via shell metacharacters to /auth admin…
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CVE-2020-14068 — Critical (CVSS 9.8): An issue was discovered in MK-AUTH 19.01. The web login functionality allows an attacker to bypass authentication and…
CVE-2023-27246 — High (CVSS 8.8): An arbitrary file upload vulnerability in the Virtual Disk of MK-Auth 23.01K4.9 allows attackers to execute arbitrary…
CVE-2021-21495 — High (CVSS 8.8): MK-AUTH through 19.01 K4.9 allows CSRF for password changes via the central/executar_central.php?acao=altsenha_princ…
CVE-2020-14069 — Medium (CVSS 6.8): An issue was discovered in MK-AUTH 19.01. There are SQL injection issues in mkt/ PHP scripts, as demonstrated by…

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