CVE-2023-26817Public exploitNetwork attack vector

Authenticated command execution via crafted email

Published Apr 7, 2023 · Updated Feb 12, 2025

Remote code execution in PGYER CodeFever before 2023.2.7-commit-b1c2e7f allows remote authenticated users to run commands. The user API accepts attacker-controlled email data, applies a regex with an unescaped dot, and lets a shell-metacharacter payload reach an exec call through EmailSender::send. Registration and login are required; successful injection runs arbitrary commands with the server process's privileges.

CVSS severity8.8
High
EPSS probability1.50%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Remote code execution in PGYER CodeFever before 2023.2.7-commit-b1c2e7f allows remote authenticated users to run commands. The user API accepts attacker-controlled email data, applies a regex with an unescaped dot, and lets a shell-metacharacter payload reach an exec call through EmailSender::send. Registration and login are required; successful injection runs arbitrary commands with the server process's privileges.

The record

CVE
CVE-2023-26817
Published
Apr 7, 2023
Updated
Feb 12, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-94, T1059
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 7, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 12, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
T1059Command and Scripting Interpreter

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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