How severe is CVE-2021-44663?

CVE-2021-44663 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-2021-44663 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-44663?

CVE-2021-44663 affects Nottingham.ac Xerte Online Toolkits. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-44663?

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-2021-44663 published?

CVE-2021-44663 was published on 2022-02-24 and last updated on 2026-06-17.

CVE-2021-44663

CVE-2021-44663 is a critical-severity vulnerability in Nottingham.ac Xerte Online Toolkits 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.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 4% (89th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Nottingham.ac Xerte Online Toolkits
Published: 2022-02-24
Last modified: 2026-06-17

Description

A Remote Code Execution (RCE) vulnerability exists in the Xerte Project Xerte through 3.8.4 via a crafted php file through elfinder in connetor.php.

Frequently asked questions

What is CVE-2021-44663?: A Remote Code Execution (RCE) vulnerability exists in the Xerte Project Xerte through 3.8.4 via a crafted php file through elfinder in connetor.php.
How severe is CVE-2021-44663?: CVE-2021-44663 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-2021-44663 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-44663?: CVE-2021-44663 affects Nottingham.ac Xerte Online Toolkits. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-44663?: 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-2021-44663 published?: CVE-2021-44663 was published on 2022-02-24 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:nottingham.ac:xerte_online_toolkits:*:*:*:*:*:*:*:*

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CVE-2021-44662 — Medium (CVSS 6.1): A Site Scripting (XSS) vulnerability exists in the Xerte Project Xerte through 3.8.4 via the link parameter in…

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