CISA KEV catalog
Confirmed active exploitation.
Listed in CISA's catalog of Known Exploited Vulnerabilities: attackers are using it in real attacks. Patch it with priority.
- Name
- PEAR Archive_Tar Improper Link Resolution Vulnerability
- Added to catalog
- Remediation due date (US federal)
- Required action
- Apply updates per vendor instructions.
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.
Affected products
php: archive tar; fedoraproject: fedora; debian: debian linux; drupal: drupal
References10
- github.com/pear/Archive_Tar/commit/cde460582ff389404b5b3ccb5937… Patch
- github.com/pear/Archive_Tar/commit/cde460582ff389404b5b3ccb5937… Patch
- lists.debian.org/debian-lts-announce/2021/01/msg00018.html Mailing ListThird Party Advisory
- lists.debian.org/debian-lts-announce/2021/04/msg00007.html Mailing ListThird Party Advisory
- lists.fedoraproject.org/archives/list/package-announce%40lists.… Broken Link
- lists.fedoraproject.org/archives/list/package-announce%40lists.… Broken Link
- lists.fedoraproject.org/archives/list/package-announce%40lists.… Broken Link
- lists.fedoraproject.org/archives/list/package-announce%40lists.… Broken Link
- security.gentoo.org/glsa/202101-23 Third Party Advisory
- www.debian.org/security/2021/dsa-4894 Third Party Advisory
Metrics
- CVSS 3.1
-
7.5
HIGH
Score source: NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N - EPSS — exploit probability
- 71% percentile: 99 · as of 2 November 2026
- CWE
- CWE-22CWE-59
Could this be exploited in your environment?
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