How severe is CVE-2021-21407?

CVE-2021-21407 has a CVSS 3.x base score of 8.0, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2021-21407 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-21407?

CVE-2021-21407 affects Combodo Itop. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-21407?

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-2021-21407 published?

CVE-2021-21407 was published on 2021-07-21 and last updated on 2026-06-17.

CVE-2021-21407

CVE-2021-21407 is a high-severity vulnerability in Combodo Itop with a CVSS 3.x base score of 8.0. 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-352.

Key facts

Severity: High (CVSS 3.x base score 8.0)
CVSS v2: 4.3
EPSS exploit prediction: 0% (37th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-352
Affected product: Combodo Itop
Published: 2021-07-21
Last modified: 2026-06-17

Description

Combodo iTop is an open source, web based IT Service Management tool. Prior to version 2.7.4, the CSRF token validation can be bypassed through iTop portal via a tricky browser procedure. The vulnerability is patched in version 2.7.4 and 3.0.0.

Frequently asked questions

What is CVE-2021-21407?: Combodo iTop is an open source, web based IT Service Management tool. Prior to version 2.7.4, the CSRF token validation can be bypassed through iTop portal via a tricky browser procedure. The vulnerability is patched in version 2.7.4 and 3.0.0.
How severe is CVE-2021-21407?: CVE-2021-21407 has a CVSS 3.x base score of 8.0, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2021-21407 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-21407?: CVE-2021-21407 affects Combodo Itop. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-21407?: 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-2021-21407 published?: CVE-2021-21407 was published on 2021-07-21 and last updated on 2026-06-17.

References

https://github.com/Combodo/iTop/security/advisories/GHSA-9wq8-4qm9-3j6f

Affected products (1)

cpe:2.3:a:combodo:itop:*:*:*:*:*:*:*:*

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