SOC status:Duty analyst on shift

UK Cyber Defence
VulnerabilityModified

CVE-2021-24245

The Stop Spammers WordPress plugin before 2021.9 did not escape user input when blocking requests (such as matching a spam word), outputting it in an attribute after sanitising it to remove HTML tags, which is not sufficient and lead to a reflected…

EXPLOITMEDIUM 6.1EPSS 5.72%

Does this matter?

A public exploit is published in Exploit-DB, so the technical barrier is gone even though the severity is medium and EPSS is 5.7%. Treat it as high on anything reachable from the internet.

Description

The Stop Spammers WordPress plugin before 2021.9 did not escape user input when blocking requests (such as matching a spam word), outputting it in an attribute after sanitising it to remove HTML tags, which is not sufficient and lead to a reflected Cross-Site Scripting issue.

CVSS 3.1
6.1 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
EPSS
5.72% probability · 93th percentile
Public exploits
1 in Exploit-DB · first 19 May 2021
CISA KEV
Not listed
Weakness
CWE-79
Affected
trumani/stop spammers
Source
contact@wpscan.com
EPSS trend
0%5%10%26 October 2026: 5.72%26 October 202626 October 2026

EPSS 5.7% since 26 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.

Public exploits (1)

Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.

EDB-IDTitleTypePublishedVerified
EDB-49880source ↗WordPress Plugin Stop Spammers 2021.8 - 'log' Reflected Cross-site Scripting (XSS)php · Hosein Vitawebapps19 May 2021no

References

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.