CVE-2020-28949

HighPublished

PEAR Archive_Tar Deserialization of Untrusted Data Vulnerability

Published: Nov 19, 2020
Updated: Oct 21, 2025
Assigning CNA: mitre
Evidence observed: Aug 25, 2022

Primary CVSS

7.8/ 10High

nvd · CVSS 3.1

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS probability estimate

84.6%

High · next 30 days

Percentile: 99.7%
Model date: Oct 16, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

CISA Known Exploited

This CVE appears in the CISA Known Exploited Vulnerabilities catalog.

Summary

Archive_Tar through 1.4.10 has :// filename sanitization only to address phar attacks, and thus any other stream-wrapper attack (such as file:// to overwrite files) can still succeed.

Sources

Repository evidence: Files: 1 · Repositories: 1

1 Module

PEAR Archive_Tar 1.4.10 Arbitrary File WriteModule
modules/exploits/multi/fileformat/archive_tar_arb_file_write.rb
Metasploit Framework modules
ExploitEvidence observed: Sep 26, 2026Revision: b22ce1fbae63Related tool
Declared conditions
- platform: PHP($.exploit_multi/fileformat/archive_tar_arb_file_write.platform)
- verification: check_not_declared($.exploit_multi/fileformat/archive_tar_arb_file_write.check)

CVE-2020-28948-and-CVE-2020-28949PoC
Proof-of-concept demonstration for CVE-2020-28948 and CVE-2020-28949, PHP Archive_Tar path traversal and arbitrary file write vulnerabilities.
PoC-for-CVE-2020-28948-CVE-2020-28949

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