SOC status:Duty analyst on shift

UK Cyber Defence
VulnerabilityModified

CVE-2021-24276

The Contact Form by Supsystic WordPress plugin before 1.7.15 did not sanitise the tab parameter of its options page before outputting it in an attribute, leading to a reflected Cross-Site Scripting issue

EXPLOITMEDIUM 6.1EPSS 16.0%

Does this matter?

EPSS puts the probability of exploitation in the next 30 days at 16.0%, higher than 97% of all known CVEs. Patch or mitigate before the next change window.

Description

The Contact Form by Supsystic WordPress plugin before 1.7.15 did not sanitise the tab parameter of its options page before outputting it in an attribute, leading 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
16.04% probability · 97th percentile
Public exploits
1 in Exploit-DB · first 28 September 2021
CISA KEV
Not listed
Weakness
CWE-79
Affected
supsystic/contact form
Source
contact@wpscan.com
EPSS trend
0%10%20%26 October 2026: 16.04%26 October 202626 October 2026

EPSS 16.0% 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-50344source ↗WordPress Plugin Contact Form 1.7.14 - Reflected Cross-Site Scripting (XSS)php · 0xB9webapps28 September 2021no

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