How severe is CVE-2026-29971?

CVE-2026-29971 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-2026-29971 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-29971?

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

Does CVE-2026-29971 have an EU (EUVD) identifier?

Yes. CVE-2026-29971 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-25916.

When was CVE-2026-29971 published?

CVE-2026-29971 was published on 2026-04-27 and last updated on 2026-06-17.

CVE-2026-29971

CVE-2026-29971 is a medium-severity vulnerability 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)
EPSS exploit prediction: 0% (22nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-25916
Weakness: CWE-79
Published: 2026-04-27
Last modified: 2026-06-17

Description

A reflected cross-site scripting (XSS) vulnerability exists in WebFileSys version before 2.32.0 and fixed in v.2.32.0. User-controlled input is reflected into HTML and JavaScript contexts without proper output encoding, allowing arbitrary JavaScript execution in the victim's browser via the ftpBackup functionality, authentication input handling, search functionality, and error message rendering components

Frequently asked questions

What is CVE-2026-29971?: A reflected cross-site scripting (XSS) vulnerability exists in WebFileSys version before 2.32.0 and fixed in v.2.32.0. User-controlled input is reflected into HTML and JavaScript contexts without proper output encoding, allowing arbitrary JavaScript execution in the victim's browser via the ftpBackup functionality, authentication input handling, search functionality, and error message rendering components
How severe is CVE-2026-29971?: CVE-2026-29971 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-2026-29971 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-29971?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-29971 have an EU (EUVD) identifier?: Yes. CVE-2026-29971 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-25916.
When was CVE-2026-29971 published?: CVE-2026-29971 was published on 2026-04-27 and last updated on 2026-06-17.

References

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

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CVE-2024-6886 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Gitea…
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CVE-2023-45138 — Critical (CVSS 10.0): Change Request is an pplication allowing users to request changes on a wiki without publishing the changes directly.…
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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