CVE-2026-57958Public exploitNetwork attack vector

Reflected XSS via unsanitized OAuth callback errors

Published Jun 29, 2026 · Updated Jun 29, 2026

Reflected XSS in Inovector Mixpost through 2.6.0 allows remote attackers to run JavaScript via a crafted OAuth callback URL. The callback controller copies the error query parameter into a Laravel flash message, and Notifications.vue renders it with Vue v-html without sanitization. Exploitation requires an authenticated user to open the link; injected code can issue same-origin requests and read session cookies only when they are script-accessible.

CVSS severity5.1
Medium
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in Inovector Mixpost through 2.6.0 allows remote attackers to run JavaScript via a crafted OAuth callback URL. The callback controller copies the error query parameter into a Laravel flash message, and Notifications.vue renders it with Vue v-html without sanitization. Exploitation requires an authenticated user to open the link; injected code can issue same-origin requests and read session cookies only when they are script-accessible.

The record

CVE
CVE-2026-57958
Published
Jun 29, 2026
Updated
Jun 29, 2026
Vendor
Inovector
Product
Mixpost
Classifications
CWE-79, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 29, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 29, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=2.6.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Inovector · Mixpostversion=0 <=2.6.0

Published CVSS scores

5.1VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
6.1VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1204.001User Execution: Malicious Link

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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