How severe is CVE-2023-40779?

CVE-2023-40779 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2023-40779 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-40779?

CVE-2023-40779 affects Icewarp Deep Castle G2. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-40779?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2023-40779 published?

CVE-2023-40779 was published on 2023-09-14 and last updated on 2026-06-17.

CVE-2023-40779

CVE-2023-40779 is a medium-severity vulnerability in Icewarp Deep Castle G2 with a CVSS 3.x base score of 6.1. 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-601.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
EPSS exploit prediction: 1% (68th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-601
Affected product: Icewarp Deep Castle G2
Published: 2023-09-14
Last modified: 2026-06-17

Description

An issue in IceWarp Mail Server Deep Castle 2 v.13.0.1.2 allows a remote attacker to execute arbitrary code via a crafted request to the URL.

Frequently asked questions

What is CVE-2023-40779?: An issue in IceWarp Mail Server Deep Castle 2 v.13.0.1.2 allows a remote attacker to execute arbitrary code via a crafted request to the URL.
How severe is CVE-2023-40779?: CVE-2023-40779 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2023-40779 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-40779?: CVE-2023-40779 affects Icewarp Deep Castle G2. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-40779?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-40779 published?: CVE-2023-40779 was published on 2023-09-14 and last updated on 2026-06-17.

References

https://medium.com/%40muthumohanprasath.r/open-redirection-vulnerability-on-icewarp-webclient-product-cve-2023-40779-61176503710

Affected products (1)

cpe:2.3:a:icewarp:deep_castle_g2:13.0.1.2:*:*:*:*:*:*:*

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