Cyber Resilience

CVE-2023-6991

HighPublic PoC

Published: 15 January 2024

Published
15 January 2024
Modified
11 June 2025
KEV Added
—
Patch
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CVSS Score v3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.0023 46.0th percentile
Risk Priority 18 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2023-6991 is a high-severity SSRF (CWE-918) vulnerability in Surniaulula Jsm File Get Contents\(\) Shortcode. Its CVSS base score is 8.8 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Network Service Discovery (T1046); ranked at the 46.0th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

EU & UK References

Vulnerability details

The JSM file_get_contents() Shortcode WordPress plugin before 2.7.1 does not validate one of its shortcode's parameters before making a request to it, which could allow users with contributor role and above to perform SSRF attacks.

CWE(s)
CWE-918

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1046 Network Service Discovery Discovery
Adversaries may attempt to get a listing of services running on remote hosts and local network infrastructure devices, including those that may be vulnerable to remote software exploitation.
attack.mitre.org →
T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
Why these techniques?

The SSRF vulnerability (CWE-918) in the WordPress plugin allows authenticated users (contributor+) to make arbitrary server-side HTTP requests to internal resources, including localhost (as shown in PoC), facilitating Network Service Discovery (T1046) via port/service probing and response observation. It also represents exploitation of a public-facing web application (T1190).

Affected Assets

surniaulula
jsm file get contents\(\) shortcode
≤ 2.7.1

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

CA-8 Penetration Testing
addresses: CWE-918

Penetration testing attempts server-side requests to internal resources, identifying SSRF weaknesses for remediation.

SC-7 Boundary Protection
addresses: CWE-918

Outbound connections to external resources can be monitored and limited at the boundary, reducing SSRF impact.

SI-10 Information Input Validation
addresses: CWE-918

Validates server-side URLs and resource references to block SSRF attempts.

SI-4 System Monitoring
addresses: CWE-918

Detects server-side request forgery through monitoring of unexpected outbound connections.

References