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CVE-2026-103377

MEDIUMCVSS 5.1/10EPSS 0.53%

Last modified

CVE-2026-103377 is a medium-severity vulnerability rated 5.1/10 on the CVSS scale. A reflected Cross-Site Scripting (XSS) vulnerability has been identified in the web application of the Castile-La Mancha Regional Parliament’s video library. The application embeds user-supplied content into the page without properly sanitising it before it is rendered by the browser. EPSS estimates a 0.53% chance of exploitation in the next 30 days.

Description

A reflected Cross-Site Scripting (XSS) vulnerability has been identified in the web application of the Castile-La Mancha Regional Parliament’s video library. The application embeds user-supplied content into the page without properly sanitising it before it is rendered by the browser. Exploitation of this vulnerability could allow a remote attacker to execute arbitrary JavaScript code in the browser of a victim who interacts with the content crafted for the attack.

Metrics

CVSS 4.0
5.1/10

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability
0.53%

44.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
Regional Parliament of Castile-La ManchaVideo library of the Regional Parliament of Castile-La Mancha< October 2026

References

Timeline

Published
Last Modified
Status
Deferred

Frequently Asked Questions

What is CVE-2026-103377?
A reflected Cross-Site Scripting (XSS) vulnerability has been identified in the web application of the Castile-La Mancha Regional Parliament’s video library. The application embeds user-supplied content into the page without properly sanitising it before it is rendered by the browser. Exploitation of this vulnerability could allow a remote attacker to execute arbitrary JavaScript code in the browser of a victim who interacts with the content crafted for the attack.
How severe is CVE-2026-103377?
CVE-2026-103377 has a CVSS score of 5.1/10 (MEDIUM severity). The EPSS model estimates a 0.53% probability of exploitation in the next 30 days.
How do I fix CVE-2026-103377?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST