How severe is CVE-2021-28048?

CVE-2021-28048 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2021-28048 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-28048?

CVE-2021-28048 primarily affects Devolutions Devolutions Server. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-28048?

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

When was CVE-2021-28048 published?

CVE-2021-28048 was published on 2021-04-14 and last updated on 2026-06-17.

CVE-2021-28048

CVE-2021-28048 is a medium-severity vulnerability in Devolutions Devolutions Server with a CVSS 3.x base score of 6.5. 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-346.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.3
EPSS exploit prediction: 1% (43rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-346
Affected product: Devolutions Devolutions Server
Published: 2021-04-14
Last modified: 2026-06-17

Description

An overly permissive CORS policy in Devolutions Server before 2021.1 and Devolutions Server LTS before 2020.3.18 allows a remote attacker to leak cross-origin data via a crafted HTML page.

Frequently asked questions

What is CVE-2021-28048?: An overly permissive CORS policy in Devolutions Server before 2021.1 and Devolutions Server LTS before 2020.3.18 allows a remote attacker to leak cross-origin data via a crafted HTML page.
How severe is CVE-2021-28048?: CVE-2021-28048 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2021-28048 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-28048?: CVE-2021-28048 primarily affects Devolutions Devolutions Server. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-28048?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-28048 published?: CVE-2021-28048 was published on 2021-04-14 and last updated on 2026-06-17.

References

https://devolutions.net/security/advisories/DEVO-2021-0004

Affected products (2)

cpe:2.3:a:devolutions:devolutions_server:*:*:*:*:lts:*:*:*
cpe:2.3:a:devolutions:devolutions_server:*:*:*:*:-:*:*:*

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