How severe is CVE-2021-28381?

CVE-2021-28381 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-28381 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-28381?

CVE-2021-28381 affects Vhs Project Vhs. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-28381?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2021-28381 published?

CVE-2021-28381 was published on 2021-03-16 and last updated on 2026-06-17.

CVE-2021-28381

CVE-2021-28381 is a critical-severity vulnerability in Vhs Project Vhs with a CVSS 3.x base score of 9.8. 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-89.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 1% (60th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-89
Affected product: Vhs Project Vhs
Published: 2021-03-16
Last modified: 2026-06-17

Description

The vhs (aka VHS: Fluid ViewHelpers) extension before 5.1.1 for TYPO3 allows SQL injection via isLanguageViewHelper.

Frequently asked questions

What is CVE-2021-28381?: The vhs (aka VHS: Fluid ViewHelpers) extension before 5.1.1 for TYPO3 allows SQL injection via isLanguageViewHelper.
How severe is CVE-2021-28381?: CVE-2021-28381 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-28381 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-28381?: CVE-2021-28381 affects Vhs Project Vhs. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-28381?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2021-28381 published?: CVE-2021-28381 was published on 2021-03-16 and last updated on 2026-06-17.

References

https://typo3.org/security/advisory/typo3-ext-sa-2021-001

Affected products (1)

cpe:2.3:a:vhs_project:vhs:*:*:*:*:*:typo3:*:*

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