CVE-2022-4777Public exploitNetwork attack vector

Contributor-level stored XSS via unescaped shortcode attributes

Published Feb 21, 2023 · Updated Mar 12, 2025

Stored XSS in sinetheta Bootstrap Shortcodes 3.4.0 and earlier allows remote authenticated users to execute script through shortcode attributes. The bs_well shortcode renders its size attribute into HTML without validation or output escaping, preserving injected event-handler markup. Contributor-level access is sufficient to save the payload, which executes in the site origin when an administrator reviews the post and moves the pointer over the rendered well.

CVSS severity5.4
Medium
EPSS probability0.47%
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 sinetheta Bootstrap Shortcodes 3.4.0 and earlier allows remote authenticated users to execute script through shortcode attributes. The bs_well shortcode renders its size attribute into HTML without validation or output escaping, preserving injected event-handler markup. Contributor-level access is sufficient to save the payload, which executes in the site origin when an administrator reviews the post and moves the pointer over the rendered well.

The record

CVE
CVE-2022-4777
Published
Feb 21, 2023
Updated
Mar 12, 2025
Vendor
sinetheta
Product
Bootstrap Shortcodes
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 21, 2023CVE publishedPublication date reported by the CVE source.
  2. Mar 12, 2025Record 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=0 <=3.4.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

sinetheta · Bootstrap Shortcodesversion=0 <=3.4.0

Published CVSS scores

5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007JavaScript/JScript

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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