CVE intelligence and bounded remediation
CVE-2021-47751 — Phphtmledit Rich Text Editor security vulnerability
High
CVSS 7.5
CuteEditor for PHP (now referred to as Rich Text Editor) 6.6 contains a directory traversal vulnerability in the browse template feature that allows attackers to write files to arbitrary web root directories. Attackers can exploit the ServerMapPath() function by renaming uploaded HTML files using directory traversal sequences to write files outside the intended template directory.
- Severity
- High
- CVSS
- 7.5 (3.1)
- Published
- 2026-01-13
- CISA KEV
- Not currently listed
- Ecosystem
- software/application
- Weaknesses
- CWE-22
Affected products
- phphtmledit / rich_text_editor
Matched remediation archetype
Path traversal, unsafe upload, and file handling
This catalog composition supplies bounded fallback guidance. Explicitly reviewed curated workflows load with the complete record below.
Check exposure
- Trace untrusted filenames, archive entries, URLs, and path segments into read, write, include, extraction, and upload operations.
- Identify filesystem roots, mount permissions, symbolic-link behavior, archive handling, and whether uploaded content is web-accessible or executable.
- Review canonicalization and containment checks across supported operating systems and storage backends.
Remediate safely
- Generate server-side storage identifiers and resolve paths beneath a fixed root using filesystem-aware containment checks.
- Reject absolute, parent-relative, alternate-separator, device, link, and archive entries that escape the intended root.
- Store uploads outside executable or served paths, validate type and size, and use private atomic temporary files.
Authoritative sources
Complete CVE record and remediation plan
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