What is CVE-2021-29028?

CVE-2021-29028 is a medium-severity vulnerability in Bitweaver, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2021-03-24.

How severe is CVE-2021-29028?

Medium severity. CVSS v3 base score is 4.8 out of 10.

XSS in Bitweaver

CVE-2021-29028

A cross-site scripting (XSS) vulnerability in Bitweaver version 3.1.0 allows remote attackers to inject JavaScript via the /users/admin/user_activity.php URI.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2021-03-24 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.008 (56.1th percentile), scored 2026-10-31.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 56th percentile — 56.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

Bitweaver — versions 3.1.0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

github.com/xoffense/POC/blob/main/Multiple URI Based XSS in Bitweaver 3.1.0.md (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2021-29028?: CVE-2021-29028 is a medium-severity vulnerability in Bitweaver, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2021-03-24.
How severe is CVE-2021-29028?: Medium severity. CVSS v3 base score is 4.8 out of 10.