Security Resilience

CVE-2023-6634

RCE in Thimpress Learnpress ≤ 4.2.5.7

RCECommand Injection
Published
11 January 2024
Modified
08 April 2026
CVSS Score v3.1 8.1
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.085 95th percentile
Risk Priority 86 floored blend · peak EPSS

CVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.

Summary

CVE-2023-6634 is a high-severity Argument Injection (CWE-88) vulnerability in Thimpress Learnpress. Its CVSS base score is 8.1 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Junk Data (T1001.001); ranked in the top 5% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified map to SA-11 (Developer Testing and Evaluation) and SI-10 (Information Input Validation) — see the control section below for these in your framework.

Deeper analysis AI-assisted summary

Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.

The LearnPress plugin for WordPress is vulnerable to command injection in all versions up to and including 4.2.5.7 via the get_content function. The root cause is unsafe use of PHP's call_user_func with attacker-controlled input, which maps to CWE-88 and CWE-77 and carries a CVSS 3.1 score of 8.1.

Unauthenticated remote attackers can invoke any public function that accepts a single parameter, enabling them to achieve arbitrary code execution on the WordPress site without requiring authentication or user interaction.

Public references from Wordfence and the WordPress plugin Trac show that the issue was fixed in changeset 3013957, which should be applied to bring installations to a patched release. The associated EPSS score remains elevated near 0.91 with no documented low-to-high trajectory after disclosure.

OWASP Top 10 for Web (2025)

A05:2025 Injection

EU & UK References

Vulnerability Data

The LearnPress plugin for WordPress is vulnerable to Command Injection in all versions up to, and including, 4.2.5.7 via the get_content function. This is due to the plugin making use of the call_user_func function with user input. This makes it…

more

possible for unauthenticated attackers to execute any public function with one parameter, which could result in remote code execution.

CWE(s)
CWE-88CWE-77

Related Threats

MITRE ATT&CK Enterprise Techniques

T1001.001 Junk Data Command And Control
Adversaries may add junk data to protocols used for command and control to make detection more difficult.
attack.mitre.org →
T1003.002 Security Account Manager Credential Access
Adversaries may attempt to extract credential material from the Security Account Manager (SAM) database either through in-memory techniques or through the Windows Registry where the SAM database is stored.
attack.mitre.org →
T1003.003 NTDS Credential Access
Adversaries may attempt to access or create a copy of the Active Directory domain database in order to steal credential information, as well as obtain other information about domain members such as devices, users, and access rights.
attack.mitre.org →
T1003.004 LSA Secrets Credential Access
Adversaries with SYSTEM access to a host may attempt to access Local Security Authority (LSA) secrets, which can contain a variety of different credential materials, such as credentials for service accounts.
attack.mitre.org →
T1003.007 Proc Filesystem Credential Access
Adversaries may gather credentials from the proc filesystem or `/proc`.
attack.mitre.org →
T1011.001 Exfiltration Over Bluetooth Exfiltration
Adversaries may attempt to exfiltrate data over Bluetooth rather than the command and control channel.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2024-1463Same product: Thimpress Learnpress
CVE-2024-4277Same product: Thimpress Learnpress
CVE-2024-10010Same product: Thimpress Learnpress
CVE-2024-13128Same product: Thimpress Learnpress
CVE-2024-3560Same product: Thimpress Learnpress
CVE-2024-9881Same product: Thimpress Learnpress
CVE-2024-4971Same product: Thimpress Learnpress
CVE-2023-30487Same product: Thimpress Learnpress
CVE-2024-13127Same product: Thimpress Learnpress
CVE-2024-13599Same product: Thimpress Learnpress

Affected Assets

thimpress
learnpress
≤ 4.2.5.7

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)

—

Detect
Catch it (NIST detect / respond)

—

Harden
Shrink the surface (DISA STIG)

—

Validate
Prove the fix (OWASP ASVS)
  • V1.2.5

Mitigating Controls (NIST 800-53 r5) AI

SA-11 Developer Testing and Evaluation good match

Developer testing can discover argument-injection flaws in command-construction code but does not stop their introduction.

SI-10 Information Input Validation good match

Input validation directly stops construction of command strings containing unneutralized delimiters or injected arguments.

SA-8 Security and Privacy Engineering Principles partial match

Secure engineering principles include proper neutralization and safe command construction practices.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-06 partial match
blocks

Secure SDLC practices directly require proper input validation and command construction to prevent argument injection.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.5.14 Information transfer partial match
removes
A.5.15 Access control partial match
removes
A.5.16 Identity management partial match
removes
A.5.17 Authentication information partial match
removes
A.5.18 Access rights partial match
removes
A.5.3 Segregation of duties partial match
removes

Hardening callouts derived

DISA STIG baselines are authored against specific weaknesses. Where this CVE cites a broad weakness class, the mapping is not asserted at that abstraction (owner ruling, 2026-09-25: grade only at Base and below), so no rule is shown here rather than a rule shown against the wrong grain.

  • No fine-grained STIG row for CWE-77, a class-level weakness, and none of its children carries one either.

References