CVE-2021-24414Public exploitNetwork attack vector

Contributor-level stored XSS via unsanitized shortcode parameters

Published Oct 25, 2021 · Updated Aug 3, 2024

Stored XSS in bPlugins YT Player before 1.4 allows remote authenticated users to execute script through a malicious shortcode. The plugin accepts the ytplayer shortcode's id parameter without sanitization or validation and emits it into rendered player markup. Contributor access is sufficient to store the payload in a post, and a visitor must view the post and interact with the embedded player to trigger it.

CVSS severityUnavailable
Unscored
EPSS probability0.62%
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 bPlugins YT Player before 1.4 allows remote authenticated users to execute script through a malicious shortcode. The plugin accepts the ytplayer shortcode's id parameter without sanitization or validation and emits it into rendered player markup. Contributor access is sufficient to store the payload in a post, and a visitor must view the post and interact with the embedded player to trigger it.

The record

CVE
CVE-2021-24414
Published
Oct 25, 2021
Updated
Aug 3, 2024
Vendor
bPlugins
Product
YT Player
Classifications
CWE-79, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 25, 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=1.4 <1.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

bPlugins · YT Playerversion=1.4 <1.4

Published CVSS scores

No CVSS assessment is available in this record.

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

CWE-79Cross-site Scripting (XSS)
T1203Exploitation for Client Execution

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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