What is CVE-2021-40922?

CVE-2021-40922 is a medium-severity vulnerability in Pixeline Bugs, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-10-01.

How severe is CVE-2021-40922?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Pixeline Bugs

CVE-2021-40922

Cross-site scripting (XSS) vulnerability in install/index.php in bugs 1.8 and below version allows remote attackers to inject arbitrary web script or HTML via the last_name parameter.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2021-10-01 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.008 (56.3th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 56th percentile — 56.3% 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

Pixeline Bugs

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

github.com/pixeline/bugs/issues/552 (Exploit, Third Party Advisory, Issue Tracking)
github.com/pixeline/bugs (Third Party Advisory)

Frequently asked questions

What is CVE-2021-40922?: CVE-2021-40922 is a medium-severity vulnerability in Pixeline Bugs, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-10-01.
How severe is CVE-2021-40922?: Medium severity. CVSS v3 base score is 6.1 out of 10.