How severe is CVE-2021-43459?

CVE-2021-43459 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2021-43459 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-2021-43459?

CVE-2021-43459 affects Rumble Mail Server Project Rumble Mail Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-43459?

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

When was CVE-2021-43459 published?

CVE-2021-43459 was published on 2022-04-04 and last updated on 2026-06-17.

CVE-2021-43459

CVE-2021-43459 is a medium-severity vulnerability in Rumble Mail Server Project Rumble Mail Server with a CVSS 3.x base score of 5.4. 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-79.

Key facts

Severity: Medium (CVSS 3.x base score 5.4)
CVSS v2: 3.5
EPSS exploit prediction: 1% (43rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Rumble Mail Server Project Rumble Mail Server
Published: 2022-04-04
Last modified: 2026-06-17

Description

A Cross Site Scripting (XSS) vulnerability exists in Rumble Mail Server 0.51.3135 via the (1) domain and (2) path parameters.

Frequently asked questions

What is CVE-2021-43459?: A Cross Site Scripting (XSS) vulnerability exists in Rumble Mail Server 0.51.3135 via the (1) domain and (2) path parameters.
How severe is CVE-2021-43459?: CVE-2021-43459 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-43459 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-2021-43459?: CVE-2021-43459 affects Rumble Mail Server Project Rumble Mail Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-43459?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-43459 published?: CVE-2021-43459 was published on 2022-04-04 and last updated on 2026-06-17.

References

https://www.exploit-db.com/exploits/49254

Affected products (1)

cpe:2.3:a:rumble_mail_server_project:rumble_mail_server:0.51.3135:*:*:*:*:*:*:*

More vulnerabilities in Rumble Mail Server Project Rumble Mail Server

CVE-2021-43456 — High (CVSS 7.8): An Unquoted Service Path vulnerablility exists in Rumble Mail Server 0.51.3135 via via a specially crafted file in the…
CVE-2021-43462 — Medium (CVSS 5.4): A Cross Site Scripting (XSS) vulnerability exists in Rumble Mail Server 0.51.3135 via the username parameter.
CVE-2021-43461 — Medium (CVSS 5.4): Cross Site Scripting (XSS) vulnerability exists in Rumble Mail Server 0.51.3135 via the servername parameter.

All CVEs affecting Rumble Mail Server Project Rumble Mail Server →

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