What is CVE-2022-28353?

CVE-2022-28353 is a medium-severity vulnerability in External Redirect Warning Project, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2023-04-16.

How severe is CVE-2022-28353?

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

XSS in External Redirect Warning Project

CVE-2022-28353

In the External Redirect Warning Plugin 1.3 for MyBB, the redirect URL (aka external.php?url=) is vulnerable to XSS.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2023-04-16 · 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: 0.006 (44.8th percentile), scored 2026-10-03.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 45th percentile — 44.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

External Redirect Warning Project — versions 1.3

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

community.mybb.com/mods.php (Vendor Advisory)
packetstormsecurity.com/files/171403/MyBB-External-Redirect-Warning-1.3-Cross-S… (Exploit, VDB Entry, Third Party Advisory)

Frequently asked questions

What is CVE-2022-28353?: CVE-2022-28353 is a medium-severity vulnerability in External Redirect Warning Project, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2023-04-16.
How severe is CVE-2022-28353?: Medium severity. CVSS v3 base score is 6.1 out of 10.