CVE-2021-32607Public exploitNetwork attack vector

Stored XSS via unsanitized private messages

Published May 12, 2021 · Updated Aug 3, 2024

Stored XSS in Smartstore through 4.1.1 allows remote attackers to execute JavaScript in a recipient's browser via a private message. Views/PrivateMessages/View.cshtml passes attacker-controlled Model.Message content directly to Html.Raw without first calling HtmlUtils.SanitizeHtml. Exploitation requires a recipient to open the crafted message, after which the script performs actions with that recipient's privileges, including administrative control when an administrator is targeted.

CVSS severity9.8
Critical
EPSS probability33.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Smartstore through 4.1.1 allows remote attackers to execute JavaScript in a recipient's browser via a private message. Views/PrivateMessages/View.cshtml passes attacker-controlled Model.Message content directly to Html.Raw without first calling HtmlUtils.SanitizeHtml. Exploitation requires a recipient to open the crafted message, after which the script performs actions with that recipient's privileges, including administrative control when an administrator is targeted.

The record

CVE
CVE-2021-32607
Published
May 12, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1189
Attack vector
network
Privileges
unauthenticated

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

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

T1189Drive-by Compromise

Public exploit references

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

Technologies

Your stack

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Your stack

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