CVE-2021-24319Public exploitNetwork attack vector

Authenticated script execution via unsanitized listing excerpt

Published Jun 1, 2021 · Updated Aug 3, 2024

Cross-site scripting in BoldThemes Bello before 1.6.0 allows attackers with valid WordPress accounts to execute code in browsers. The listing endpoint returns unsanitized post_excerpt input within generated page content, enabling injected HTML and script execution. Exploitation requires account access and subsequent loading of the modified listing page; code runs only inside the browser security context.

CVSS severity5.4
Medium
EPSS probability1.68%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in BoldThemes Bello before 1.6.0 allows attackers with valid WordPress accounts to execute code in browsers. The listing endpoint returns unsanitized post_excerpt input within generated page content, enabling injected HTML and script execution. Exploitation requires account access and subsequent loading of the modified listing page; code runs only inside the browser security context.

The record

CVE
CVE-2021-24319
Published
Jun 1, 2021
Updated
Aug 3, 2024
Vendor
BoldThemes
Product
Bello WordPress Theme
Classifications
CWE-79
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 1, 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=1.6.0 <1.6.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

BoldThemes · Bello WordPress Themeversion=1.6.0 <1.6.0

Published CVSS scores

3.5NVDAV:N/AC:M/Au:S/C:N/I:P/A:N
5.4NVDCVSS: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 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-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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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