How severe is CVE-2021-45915?

CVE-2021-45915 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-2021-45915 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (71st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-45915?

CVE-2021-45915 affects Luxsoft Luxcal. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-45915?

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-2021-45915 published?

CVE-2021-45915 was published on 2022-05-24 and last updated on 2026-06-17.

CVE-2021-45915

CVE-2021-45915 is a critical-severity vulnerability in Luxsoft Luxcal 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: 1% (71st percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Luxsoft Luxcal
Published: 2022-05-24
Last modified: 2026-06-17

Description

In LuxSoft LuxCal Web Calendar before 5.2.0, an unauthenticated attacker can manipulate a cookie value. This allows the attacker's session to be authenticated as any registered LuxCal user, including the site administrator.

Frequently asked questions

What is CVE-2021-45915?: In LuxSoft LuxCal Web Calendar before 5.2.0, an unauthenticated attacker can manipulate a cookie value. This allows the attacker's session to be authenticated as any registered LuxCal user, including the site administrator.
How severe is CVE-2021-45915?: CVE-2021-45915 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-2021-45915 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (71st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-45915?: CVE-2021-45915 affects Luxsoft Luxcal. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-45915?: 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-2021-45915 published?: CVE-2021-45915 was published on 2022-05-24 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:luxsoft:luxcal:*:*:*:*:*:*:*:*

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CVE-2021-45914 — Critical (CVSS 9.8): In LuxSoft LuxCal Web Calendar before 5.2.0, an unauthenticated attacker can manipulate a POST request. This allows the…

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