CVE-2026-57958
Mixpost 2.6.0 - Reflected XSS via OAuth Callback Error Parameter
- State
- Published
- Severity
- 5.1 Medium
- Published
- Jun 29, 2026
- Updated
- Jun 29, 2026
- Reserved
- Jun 26, 2026
Description
Mixpost through 2.6.0 contains a reflected cross-site scripting vulnerability that allows unauthenticated attackers to execute arbitrary JavaScript in authenticated users' browsers by crafting malicious OAuth callback URLs with unsanitized error query parameters. Attackers can exploit the OAuth callback controller's failure to sanitize error parameters before rendering them through Laravel flash messages via the Vue v-html directive to hijack authenticated user sessions or perform unauthorized actions.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 5.1 Medium | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N | VulnCheck |
| 3.1 | 6.1 Medium | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N | VulnCheck |
Weaknesses
- CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Products
| Product | Versions |
|---|---|
mixpostinovector |
|
References
- Researcher Disclosureissue-tracking
- https://www.vulncheck.com/advisories/mixpost-reflected-xss-via-oauth-callback-error-parameterthird-party-advisory
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