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CVE-2026-77115highCWE-79

Brave Popup Builder < 0.8.6 - Unauthenticated Reflected XSS via UTM Parameters

41Vexday Risk Score

No sign of exploitation. It has a public proof of concept.

ssvc Attendcvss 7.1epss 0.2%
exploitation probability
0.2%top 89% of all CVEs
observed exploitation
nono source reports it
1 public exploit(s)
Brave Popup Builder (brave-popup-builder) up to version 0.8.5 reflects UTM query parameters into popup form HTML without escaping them.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
Affected products
Unknown · Brave
⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.