CVE-2021-32608Public exploitNetwork attack vector

Stored XSS via nested BBCode URL tags

Published May 12, 2021 · Updated Aug 3, 2024

Stored XSS in Smartstore 4.1.1 and earlier allows remote authenticated users to execute script through a crafted forum post. Nested BBCode URL tags cause a second regex replacement to reinterpret quotes introduced by the first before _ForumPost.cshtml renders FormattedText as raw HTML. A victim must view the post; an administrator's session can be abused to create a new administrator and upload a code-executing plugin.

CVSS severity9.8
Critical
EPSS probability33.44%
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 Smartstore 4.1.1 and earlier allows remote authenticated users to execute script through a crafted forum post. Nested BBCode URL tags cause a second regex replacement to reinterpret quotes introduced by the first before _ForumPost.cshtml renders FormattedText as raw HTML. A victim must view the post; an administrator's session can be abused to create a new administrator and upload a code-executing plugin.

The record

CVE
CVE-2021-32608
Published
May 12, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 12, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:P
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

T1190Exploit Public-Facing Application

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