CVE-2025-67438 json
Sync-in Server has a stored cross-site scripting (XSS) vulnerability
published 2026-02-20 8 mo ago modified 2026-06-17 4 mo ago also GHSA-9jmq-xgjm-p8c2 , EUVD-2025-207637
- cvss
- 6.1
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 24%
- public exploits
- 0
- none known
Summary
A Stored Cross-Site Scripting (XSS) vulnerability in Sync-in Server before 1.9.3 allows an authenticated attacker to execute arbitrary JavaScript in a victim's browser. By uploading a crafted SVG file containing a malicious payload, an attacker can access and exfiltrate sensitive information, including the user's session cookies.
Patch / fix
- npm @sync-in/server 1.9.3
- sync-in sync-in_server 1.9.3
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- partial
- Assessed
- 8 mo ago
Exploit prediction
0.32% chance of exploitation in the next 30 days, higher than 24% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- gist.github.com https://gist.github.com/x0root/86db30af91bb0e1707eb7e57a049b6ad referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| CNA | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | @sync-in/server | <1.9.3 |
1.9.3 |
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
github.com
/Sync-in/server/releases/tag/v1.9.3
web, patch, release-notes
-
github.com
/Sync-in/server/commit/a6276d067725637310e4e83a3eee337aae81f439
web
-
gist.github.com
/x0root/86db30af91bb0e1707eb7e57a049b6ad
web, exploit, third-party-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2025-67438
advisory
-
github.com
/Sync-in/server
package
Sources
- CVE List CVE-2025-67438
- GitHub Advisory GHSA-9jmq-xgjm-p8c2
- NVD CVE-2025-67438
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