CVE-2023-5980Public exploitNetwork attack vector

Administrator-level stored XSS via unsanitized list names

Published Dec 26, 2023 · Updated Apr 17, 2025

Stored XSS in BannerSky BSK Forms Blacklist before 3.7 allows remote authenticated users to execute scripts through a crafted list name. The plugin’s blacklist settings save a list name without sanitizing it and render that value without output escaping in the administrative interface. Administrator privileges are required, and execution occurs when a user views the stored entry even where unfiltered_html is disabled, such as on multisite installations.

CVSS severity4.8
Medium
EPSS probability0.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Stored XSS in BannerSky BSK Forms Blacklist before 3.7 allows remote authenticated users to execute scripts through a crafted list name. The plugin’s blacklist settings save a list name without sanitizing it and render that value without output escaping in the administrative interface. Administrator privileges are required, and execution occurs when a user views the stored entry even where unfiltered_html is disabled, such as on multisite installations.

The record

CVE
CVE-2023-5980
Published
Dec 26, 2023
Updated
Apr 17, 2025
Vendor
BannerSky
Product
BSK Forms Blacklist
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Dec 26, 2023CVE publishedPublication date reported by the CVE source.
  2. Apr 17, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <3.7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

BannerSky · BSK Forms Blacklistversion=0 <3.7

Published CVSS scores

4.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
4.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007Command and Scripting Interpreter: JavaScript

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo