Administrator session hijacking via unescaped OAuth name
Published May 28, 2026 · Updated May 28, 2026
Stored XSS in LinkAce before 2.5.6 allows remote authenticated users to run JavaScript in an administrator's browser through an OAuth name. SocialiteController stores an unvalidated OAuth display name, ActivityEntry inserts it into an audit string, and the Blade view emits that string as raw HTML. SSO/OAuth must be enabled, the attacker must create an activity-log event, and an administrator must open the audit page; execution permits session-cookie or CSRF-token theft and administrator actions.
Summary
What happened
Stored XSS in LinkAce before 2.5.6 allows remote authenticated users to run JavaScript in an administrator's browser through an OAuth name. SocialiteController stores an unvalidated OAuth display name, ActivityEntry inserts it into an audit string, and the Blade view emits that string as raw HTML. SSO/OAuth must be enabled, the attacker must create an activity-log event, and an administrator must open the audit page; execution permits session-cookie or CSRF-token theft and administrator actions.
The record
- CVE
- CVE-2026-45343
- Published
- May 28, 2026
- Updated
- May 28, 2026
- Vendor
- Kovah
- Product
- LinkAce
- Classifications
- CWE-79, T1203
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- May 28, 2026CVE publishedPublication date reported by the CVE source.
- May 28, 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.
- Affected versionversion=< 2.5.6
What conditions does exploitation require?
What is affected?
Published CVSS scores
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.
Weakness, pattern, technique
Public exploit references
- GitHub advisory reproduction steps and videoproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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