What is CVE-2021-25121?

CVE-2021-25121 is a medium-severity vulnerability in Bestwebsoft Rating, classified under Integer Underflow. CVSS score: 6.5/10. Published 2022-06-20.

How severe is CVE-2021-25121?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Is CVE-2021-25121 known to be exploited?

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

Integer overflow in Bestwebsoft Rating

CVE-2021-25121

The Rating by BestWebSoft WordPress plugin before 1.6 does not validate the submitted rating, allowing submission of long integer, causing a Denial of Service on the post/page when a user submit such rating

Published 2022-06-20 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.012 (67.4th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 67th percentile — 67.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: -0.000

Affected products

Bestwebsoft Rating
Rating By Bestwebsoft — versions 1.6

Weakness classification (CWE)

CWE-191 — Integer Underflow

Public proof-of-concept exploits

20142995/nuclei-templates

References

wpscan.com/vulnerability/efb1ddef-2123-416c-a932-856d41ed836d (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2021-25121?: CVE-2021-25121 is a medium-severity vulnerability in Bestwebsoft Rating, classified under Integer Underflow. CVSS score: 6.5/10. Published 2022-06-20.
How severe is CVE-2021-25121?: Medium severity. CVSS v3 base score is 6.5 out of 10.
Is CVE-2021-25121 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.