HOMEVULNERABILITIESCVE-2026-30948
MEDIUM

CVE-2026-30948

CWE-79Published: March 10, 2026· Updated: Mar 11, 2026

5.4
CVSS v3.1
EPSS:0.01%probability of exploitation in 30 daysPercentile:3.2th

Official Description

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to 9.5.2-alpha.4 and 8.6.17, a stored cross-site scripting (XSS) vulnerability allows any authenticated user to upload an SVG file containing JavaScript. The file is served inline with Content-Type: image/svg+xml and without protective headers, causing the browser to execute embedded scripts in the Parse Server origin. This can be exploited to steal session tokens from localStorage and achieve account takeover. The default fileExtensions option blocks HTML file extensions but does not block SVG, which is a well-known XSS vector. All Parse Server deployments where file upload is enabled for authenticated users (the default) are affected. This vulnerability is fixed in 9.5.2-alpha.4 and 8.6.17.

NVD Source

Technical Analysis

CVE-2026-30948 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.

From a weakness classification perspective (CWE-79): Cross-site scripting (XSS) vulnerabilities allow attackers to inject malicious scripts into web pages viewed by other users.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.Low
User InteractionRequired
ScopeChanged
Impact
ConfidentialityLow
IntegrityLow
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Affected Vendors & Products

parseplatform1 product
parse-server
Source: NVD CPE · 2 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://github.com/parse-community/parse-server/security/advisories/GHSA-hcj7-6gxh-24ww

All References (3)

→
https://github.com/parse-community/parse-server/releases/tag/8.6.17Product · Release Notes
→
https://github.com/parse-community/parse-server/releases/tag/9.5.2-alpha.4Product · Release Notes
→
https://github.com/parse-community/parse-server/security/advisories/GHSA-hcj7-6gxh-24wwMitigation · Patch · Vendor Advisory

Quick Facts

CVE IDCVE-2026-30948
CVSS Score5.4 / 10
SeverityMEDIUM
WeaknessCWE-79
CISA KEVNo
EPSS (30d)0.01%
Affected1 vendor
PublishedMar 10, 2026

Related CVEs (CWE-79)

CVE-2026-54158
9.9
CVE-2026-54067
9.9
CVE-2026-50551
9.9
CVE-2026-40472
9.9
CVE-2026-40470
9.9
CVE-2025-14320
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-30948 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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