What is CVE-2021-24853?

CVE-2021-24853 is a medium-severity vulnerability in Qr Redirector Project, classified under Improper Access Control. CVSS score: 4.3/10. Published 2021-11-17.

How severe is CVE-2021-24853?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Is CVE-2021-24853 known to be exploited?

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

CSRF in Qr Redirector Project

CVE-2021-24853

The QR Redirector WordPress plugin before 1.6 does not have capability and CSRF checks when saving bulk QR Redirector settings via the qr_save_bulk AJAX action, which could allow any authenticated user, such as subscriber to change the redirect response status code of arbitrary QR Redirects

Published 2021-11-17 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.004 (36.8th percentile), scored 2026-10-07.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 37th percentile — 36.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.000

Affected products

Qr Redirector Project
Qr Redirector — versions 1.6

Weakness classification (CWE)

Public proof-of-concept exploits

References

wpscan.com/vulnerability/240bed24-0315-4bbf-ba17-e4947e5ecacb (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2021-24853?: CVE-2021-24853 is a medium-severity vulnerability in Qr Redirector Project, classified under Improper Access Control. CVSS score: 4.3/10. Published 2021-11-17.
How severe is CVE-2021-24853?: Medium severity. CVSS v3 base score is 4.3 out of 10.
Is CVE-2021-24853 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.