What is CVE-2023-3142?

CVE-2023-3142 is a medium-severity vulnerability in Microweber, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2023-06-07.

How severe is CVE-2023-3142?

Medium severity. CVSS v3 base score is 5.4 out of 10.

Is CVE-2023-3142 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Microweber

CVE-2023-3142

Cross-site Scripting (XSS) - Stored in GitHub repository microweber/microweber prior to 2.0.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2023-06-07 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.003 (25.6th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 26th percentile — 25.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

Microweber
Microweber Microweber/microweber — versions unspecified

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

tht1997/tht1997

References

huntr.dev/bounties/d00686b0-f89a-4e14-98d7-b8dd3f92a6e5 (Exploit, Patch, Third Party Advisory)
github.com/microweber/microweber/commit/42efa981a2239d042d910069952d6276497bdcf1 (Patch)

Frequently asked questions

What is CVE-2023-3142?: CVE-2023-3142 is a medium-severity vulnerability in Microweber, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2023-06-07.
How severe is CVE-2023-3142?: Medium severity. CVSS v3 base score is 5.4 out of 10.
Is CVE-2023-3142 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.