How severe is CVE-2021-43264?

CVE-2021-43264 has a CVSS 3.x base score of 3.3, rated low severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2021-43264 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-43264?

CVE-2021-43264 affects Mahara. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-43264?

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

When was CVE-2021-43264 published?

CVE-2021-43264 was published on 2021-11-02 and last updated on 2026-06-17.

CVE-2021-43264

CVE-2021-43264 is a low-severity vulnerability in Mahara with a CVSS 3.x base score of 3.3. 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-22.

Key facts

Severity: Low (CVSS 3.x base score 3.3)
CVSS v2: 2.1
EPSS exploit prediction: 1% (42nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-22
Affected product: Mahara
Published: 2021-11-02
Last modified: 2026-06-17

Description

In Mahara before 20.04.5, 20.10.3, 21.04.2, and 21.10.0, adjusting the path component for the page help file allows attackers to bypass the intended access control for HTML files via directory traversal. It replaces the - character with the / character.

Frequently asked questions

What is CVE-2021-43264?: In Mahara before 20.04.5, 20.10.3, 21.04.2, and 21.10.0, adjusting the path component for the page help file allows attackers to bypass the intended access control for HTML files via directory traversal. It replaces the - character with the / character.
How severe is CVE-2021-43264?: CVE-2021-43264 has a CVSS 3.x base score of 3.3, rated low severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2021-43264 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-43264?: CVE-2021-43264 affects Mahara. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-43264?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-43264 published?: CVE-2021-43264 was published on 2021-11-02 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:mahara:mahara:*:*:*:*:*:*:*:*

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