How severe is CVE-2025-31483?

CVE-2025-31483 has a CVSS 4.0 base score of 4.8, rated medium severity.

Is CVE-2025-31483 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (30th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-31483?

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

Does CVE-2025-31483 have an EU (EUVD) identifier?

Yes. CVE-2025-31483 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-9736.

When was CVE-2025-31483 published?

CVE-2025-31483 was published on 2025-04-03 and last updated on 2026-06-17.

CVE-2025-31483

CVE-2025-31483 is a medium-severity vulnerability with a CVSS 4.0 base score of 4.8. 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 4.0 base score 4.8)
EPSS exploit prediction: 0% (30th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-9736
Weakness: CWE-79
Published: 2025-04-03
Last modified: 2026-06-17

Description

Miniflux is a feed reader. Due to a weak Content Security Policy on the /proxy/* route, an attacker can bypass the CSP of the media proxy and execute cross-site scripting when opening external images in a new tab/window. To mitigate the vulnerability, the CSP for the media proxy has been changed from default-src 'self' to default-src 'none'; form-action 'none'; sandbox;. This vulnerability is fixed in 2.2.7.

Frequently asked questions

What is CVE-2025-31483?: Miniflux is a feed reader. Due to a weak Content Security Policy on the /proxy/* route, an attacker can bypass the CSP of the media proxy and execute cross-site scripting when opening external images in a new tab/window. To mitigate the vulnerability, the CSP for the media proxy has been changed from default-src 'self' to default-src 'none'; form-action 'none'; sandbox;. This vulnerability is fixed in 2.2.7.
How severe is CVE-2025-31483?: CVE-2025-31483 has a CVSS 4.0 base score of 4.8, rated medium severity.
Is CVE-2025-31483 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (30th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-31483?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-31483 have an EU (EUVD) identifier?: Yes. CVE-2025-31483 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-9736.
When was CVE-2025-31483 published?: CVE-2025-31483 was published on 2025-04-03 and last updated on 2026-06-17.

References

Other CWE-79 (Cross-site Scripting (XSS)) vulnerabilities

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CVE-2022-4361 — Critical (CVSS 10.0): Keycloak, an open-source identity and access management solution, has a cross-site scripting (XSS) vulnerability in the…

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