How severe is CVE-2021-25277?

CVE-2021-25277 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-2021-25277 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-25277?

CVE-2021-25277 affects Ftapi. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-25277?

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

When was CVE-2021-25277 published?

CVE-2021-25277 was published on 2021-03-19 and last updated on 2026-06-17.

CVE-2021-25277

CVE-2021-25277 is a medium-severity vulnerability in Ftapi 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-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v2: 4.3
EPSS exploit prediction: 1% (53rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Ftapi
Published: 2021-03-19
Last modified: 2026-06-17

Description

FTAPI 4.0 - 4.10 allows XSS via a crafted filename to the alternative text hover box in the file submission component.

Frequently asked questions

What is CVE-2021-25277?: FTAPI 4.0 - 4.10 allows XSS via a crafted filename to the alternative text hover box in the file submission component.
How severe is CVE-2021-25277?: CVE-2021-25277 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-2021-25277 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-25277?: CVE-2021-25277 affects Ftapi. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-25277?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-25277 published?: CVE-2021-25277 was published on 2021-03-19 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:ftapi:ftapi:*:*:*:*:*:*:*:*

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