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CVE-2020-28337

42
FAUCET Score

CVE-2020-28337 describes a directory traversal vulnerability in Microweber through version 1.1.20, specifically within its Utils/Unzip module. An authenticated administrative user can exploit this flaw by uploading a specially crafted ZIP file containing relative paths, moving it to the backup directory, and then initiating a restore operation, leading to remote code execution. This high-severity vulnerability (CVSS 7.2) requires high privileges but allows for complete compromise of confidentiality, integrity, and availability. While not listed in CISA KEV, public exploit code exists on ExploitDB, though there is minimal community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.1.20CPE matchmatch criteria
cpe:2.3:a:microweber:microweber:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.2HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.2
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
16.61%
Probability of exploitation in next 30 days
EPSS Percentile
96.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
ExploitDB: EDB-49856 · May 10, 2021
This CVE's current EPSS score of 0.1661 is in the 95th percentile among its peer group of 5,531 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.3 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

composerpatch availablevia ghsa
Product: microweber/microweberFixed in: 1.2.3
github_advisorypatch availablevia nvd_reference
View patch

Vendor Advisories (1)

composerGHSA-pqcf-v8v5-jmcghigh

Zip slip in Microweber

Feb 10, 2022

References

packetstormsecurity.com / files/162514/Microweber-CMS-1.1.20-Remote-Code-Execution.html
ExploitThird Party AdvisoryVDB Entry
github.com / microweber/microweber/commit/777ee9c3e7519eb3672c79ac41066175b2001b50
PatchThird Party Advisory
sl1nki.page / advisories/CVE-2020-28337
Third Party Advisory
sl1nki.page / blog/2021/02/01/microweber-zip-slip
ExploitPatchThird Party Advisory