CVE-2021-32696Public exploitNetwork attack vector

Cross-site scripting via array-like input concatenation

Published Jun 18, 2021 · Updated Aug 3, 2024

Type confusion in striptags before 3.2.0 allows remote attackers to cause cross-site scripting through crafted array-like input. The striptags_internal function iterates non-string iterable values and concatenates their elements without applying tag removal to embedded strings. Exploitation requires a consuming application to pass attacker-controlled structured input into the function and embed its output in a page, enabling script execution in a victim's browser.

CVSS severity3.7
Low
EPSS probability1.08%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Type confusion in striptags before 3.2.0 allows remote attackers to cause cross-site scripting through crafted array-like input. The striptags_internal function iterates non-string iterable values and concatenates their elements without applying tag removal to embedded strings. Exploitation requires a consuming application to pass attacker-controlled structured input into the function and embed its output in a page, enabling script execution in a victim's browser.

The record

CVE
CVE-2021-32696
Published
Jun 18, 2021
Updated
Aug 3, 2024
Vendor
Eric Norris
Product
striptags
Classifications
CWE-79, CWE-843, CWE-241
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 18, 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?

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

  1. Affected versionversion=< 3.2.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Eric Norris · striptagsversion=< 3.2.0

Published CVSS scores

3.7GitHub, Inc.CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
5.3NISTCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
5.0NISTAV:N/AC:L/Au:N/C:N/I:P/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.

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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

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-843Access of Resource Using Incompatible Type ('Type Confusion')
CWE-241Improper Handling of Unexpected Data Type

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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