Vulnerability · Published Jun 6, 2025 · Assigned by zdi

CVE-2025-54742BrightSparks SyncBackFree Link Following Local Privilege Escalation Vulnerability

High 7.3

In plain English

A high-severity security flaw in SyncBackFree from 2BrightSparks. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 27% of all known vulnerabilities).

Severity (CVSS 3.0)7.3High

Exploit odds (30 days)0.3%top 72.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

2BrightSparks SyncBackFree Link Following Local Privilege Escalation Vulnerability. This vulnerability allows local attackers to escalate privileges on affected installations of 2BrightSparks SyncBackFree. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. User interaction on the part of an administrator is also required. The specific flaw exists within the Mirror functionality. By creating a junction, an attacker can abuse the service to delete arbitrary files. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of SYSTEM. Was ZDI-CAN-26962.

Affected products (as reported)

Vendor	Product	Versions
2BrightSparks	SyncBackFree	11.3.87.0

Weakness: CWE-59 · Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

References

ZDI-25-322 x_research-advisory