How severe is CVE-2021-21438?

CVE-2021-21438 has a CVSS 3.x base score of 3.5, rated low severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2021-21438 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-21438?

CVE-2021-21438 primarily affects Otrs Faq. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-21438?

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

When was CVE-2021-21438 published?

CVE-2021-21438 was published on 2021-03-22 and last updated on 2026-06-17.

CVE-2021-21438

CVE-2021-21438 is a low-severity vulnerability in Otrs Faq with a CVSS 3.x base score of 3.5. 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-276.

Key facts

Severity: Low (CVSS 3.x base score 3.5)
CVSS v2: 4.0
EPSS exploit prediction: 1% (46th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-276
Affected product: Otrs Faq
Published: 2021-03-22
Last modified: 2026-06-17

Description

Agents are able to see linked FAQ articles without permissions (defined in FAQ Category). This issue affects: FAQ version 6.0.29 and prior versions, OTRS version 7.0.24 and prior versions.

Frequently asked questions

What is CVE-2021-21438?: Agents are able to see linked FAQ articles without permissions (defined in FAQ Category). This issue affects: FAQ version 6.0.29 and prior versions, OTRS version 7.0.24 and prior versions.
How severe is CVE-2021-21438?: CVE-2021-21438 has a CVSS 3.x base score of 3.5, rated low severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2021-21438 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-21438?: CVE-2021-21438 primarily affects Otrs Faq. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-21438?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-21438 published?: CVE-2021-21438 was published on 2021-03-22 and last updated on 2026-06-17.

References

https://otrs.com/release-notes/otrs-security-advisory-2021-08/

Affected products (2)

cpe:2.3:a:otrs:faq:*:*:*:*:*:*:*:*
cpe:2.3:a:otrs:otrs:*:*:*:*:*:*:*:*

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