How severe is GHSA-rpw6-9xfx-jvcx?

GHSA-rpw6-9xfx-jvcx has a CVSS score of 7.5/10, rated HIGH. Immediate patching is strongly recommended.

Which packages are affected by GHSA-rpw6-9xfx-jvcx?

GHSA-rpw6-9xfx-jvcx affects the following packages: pear/archive_tar (Packagist). Ecosystems affected: Packagist.

How do I fix GHSA-rpw6-9xfx-jvcx?

Update pear/archive_tar to version 1.4.13 or later. Run your dependency manager's update command and verify no transitive dependencies pin the vulnerable version. Use O3 Security's SCA scanner to confirm the fix is applied across your entire dependency tree.

Is GHSA-rpw6-9xfx-jvcx actively exploited in the wild?

Yes. There are 2 known exploit references for GHSA-rpw6-9xfx-jvcx, including 2 in-the-wild exploitations observed on GitHub and other sources. Treat this as actively exploitable and prioritize patching immediately. All exploit code should only be run in an isolated sandbox environment for research or authorized testing — never against production systems without explicit written authorization.

What is the EPSS score for GHSA-rpw6-9xfx-jvcx?

GHSA-rpw6-9xfx-jvcx has an EPSS (Exploit Prediction Scoring System) score of 71.1%, placing it in the 99th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. A score above 50% indicates significantly elevated exploitation risk — immediate patching is strongly recommended.

Is GHSA-rpw6-9xfx-jvcx in the CISA Known Exploited Vulnerabilities catalog?

Yes. GHSA-rpw6-9xfx-jvcx (PEAR Archive_Tar Improper Link Resolution Vulnerability) was added to CISA's Known Exploited Vulnerabilities (KEV) catalog on 2022-08-25. CISA required all US federal civilian agencies to remediate this vulnerability by 2022-09-15. The required action was: Apply updates per vendor instructions. Being listed in the KEV catalog is the strongest possible confirmation of active exploitation — treat this as a critical priority.

What type of vulnerability is GHSA-rpw6-9xfx-jvcx?

GHSA-rpw6-9xfx-jvcx is classified as Path Traversal (CWE-22), CWE-59 (CWE-59). These weakness types describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation. This is a high-impact weakness class that often enables remote code execution or data exposure.

When was GHSA-rpw6-9xfx-jvcx published, and has it been updated?

GHSA-rpw6-9xfx-jvcx was published on April 22, 2021 and was last updated on October 22, 2025. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

CISA KEV·Added 2022-08-25 — agencies required to remediate by 2022-09-15

🐘 Packagist

GHSA-rpw6-9xfx-jvcx

HIGH

Directory Traversal in Archive_Tar

Also known asBIT-drupal-2020-36193CVE-2020-36193

Published

Apr 22, 2021

Updated

Oct 22, 2025

Affected

1 pkg

Patched

1 / 1

Exploits

2 known

EPSS Exploitation Probability

via FIRST.org ↗

71.1%probability of exploitation in next 30 days

Very High Risk99th percentile0.00%

EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.

Blast Radius

1 pkg affected

🐘pear/archive_tar

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.

Description

Tar.php in Archive_Tar through 1.4.11 allows write operations with Directory Traversal due to inadequate checking of symbolic links, a related issue to CVE-2020-28948.

:exclamation: Note:

There was an initial fix for this vulnerability made in version 1.4.12. That fix introduced a bug which was fixed in 1.4.13. Therefore we have set the first-patched-version to 1.4.13 which the earliest working version that avoids this vulnerability.

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
🐘Packagist	`pear/archive_tar`	all versions	1.4.13

Exploits & PoCs

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

Tar.php in Archive_Tar through 1.4.11 allows write operations with Direc…

unit42.paloaltonetworks.comAPIAug 2022

Tar.php in Archive_Tar through 1.4.11 allows write operations with Direc…

cisa.govCISAAug 2022

Frequently Asked Questions

Tar.php in Archive_Tar through 1.4.11 allows write operations with Directory Traversal due to inadequate checking of symbolic links, a related issue to CVE-2020-28948. ### :exclamation: Note: There was an [initial fix](https://github.com/pear/Archive_Tar/commit/cde460582ff389404b5b3ccb59374e9b389de916) for this vulnerability made in version `1.4.12`. That fix introduced a bug which was [fixed in 1.4.13](https://github.com/pear/Archive_Tar/pull/36). Therefore we have set the first-patched-version to `1.4.13` which the earliest working version that avoids this vulnerability.

O3 Security · Impact-Aware SCA

Is GHSA-rpw6-9xfx-jvcx in your stack?

O3 detects GHSA-rpw6-9xfx-jvcx across Packagist dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.

Scan my stack How O3 SCA works

CVSS Score

7.5/10

CVSS v3 base score

Vector breakdown

AV:Attack Vector

Network

AC:Attack Complexity

Low

PR:Privileges Required

None

UI:User Interaction

None

S:Scope

Unchanged

C:Confidentiality

None

I:Integrity

High

A:Availability

None

Raw vector

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

CWE Classification

CWE-22Path Traversal CWE-59CWE-59

Weaponization

No known public exploit tooling found.

Timeline

Disclosed

Apr 22, 2021

First exploit

Aug 19, 2022

KEV added

Aug 25, 2022

Last updated

Oct 22, 2025

Identifiers

GHSA-rpw6-9xfx-jvcx

BIT-drupal-2020-36193

References

Advisorynvd.nist.gov Webgithub.com Webgithub.com Webdrupal.org Webdebian.org Webcisa.gov Websecurity.gentoo.org Weblists.fedoraproject.org Weblists.fedoraproject.org Weblists.fedoraproject.org Weblists.fedoraproject.org Weblists.fedoraproject.org Weblists.fedoraproject.org Weblists.fedoraproject.org Weblists.fedoraproject.org Weblists.debian.org Weblists.debian.org Webgithub.com Packagegithub.com

Data from OSV.dev, enriched by O3 Security. Refreshed hourly.