How severe is CVE-2021-38623?

CVE-2021-38623 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2021-38623 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (57th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-38623?

CVE-2021-38623 affects Deferred Image Processing Project Deferred Image Processing. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-38623?

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

When was CVE-2021-38623 published?

CVE-2021-38623 was published on 2021-08-13 and last updated on 2026-06-17.

CVE-2021-38623

CVE-2021-38623 is a high-severity vulnerability in Deferred Image Processing Project Deferred Image Processing with a CVSS 3.x base score of 7.5. 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-404.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (57th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-404
Affected product: Deferred Image Processing Project Deferred Image Processing
Published: 2021-08-13
Last modified: 2026-06-17

Description

The deferred_image_processing (aka Deferred image processing) extension before 1.0.2 for TYPO3 allows Denial of Service via the FAL API because of /var/transient disk consumption.

Frequently asked questions

What is CVE-2021-38623?: The deferred_image_processing (aka Deferred image processing) extension before 1.0.2 for TYPO3 allows Denial of Service via the FAL API because of /var/transient disk consumption.
How severe is CVE-2021-38623?: CVE-2021-38623 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2021-38623 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (57th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-38623?: CVE-2021-38623 affects Deferred Image Processing Project Deferred Image Processing. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-38623?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-38623 published?: CVE-2021-38623 was published on 2021-08-13 and last updated on 2026-06-17.

References

https://typo3.org/security/advisory/typo3-ext-sa-2021-009

Affected products (1)

cpe:2.3:a:deferred_image_processing_project:deferred_image_processing:*:*:*:*:*:typo3:*:*

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