What is CVE-2023-1881?

CVE-2023-1881 is a medium-severity vulnerability in Microweber, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2023-04-05.

How severe is CVE-2023-1881?

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

Is CVE-2023-1881 known to be exploited?

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

XSS in Microweber

CVE-2023-1881

Cross-site Scripting (XSS) - Stored in GitHub repository microweber/microweber prior to 1.3.3.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2023-04-05 · 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: 0.005 (39.9th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 40th percentile — 39.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Microweber
Microweber Microweber/microweber — versions unspecified

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

punggawacybersecurity/CVE-List

References

huntr.dev/bounties/d5ebc2bd-8638-41c4-bf72-7c906c601344 (Exploit, Patch, Third Party Advisory)
github.com/microweber/microweber/commit/8d039de2d615956f6df8df0bb1045ff3be88f183 (Patch)

Frequently asked questions

What is CVE-2023-1881?: CVE-2023-1881 is a medium-severity vulnerability in Microweber, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2023-04-05.
How severe is CVE-2023-1881?: Medium severity. CVSS v3 base score is 5.4 out of 10.
Is CVE-2023-1881 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.