CVE-2021-20746Network attack vector

Authenticated browser script execution via undisclosed vectors

Published Jun 28, 2021 · Updated Aug 3, 2024

Cross-site scripting in Hector Cabrera WP Popular Posts 5.3.2 and earlier allows remote authenticated users to inject scripts. The developer and JVN have not published the affected parameter, code locus, or missing neutralization operation. An authenticated account is required, and exploitation executes the injected script when an administrator views the affected content.

CVSS severity5.4
Medium
EPSS probability1.44%
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 Hector Cabrera WP Popular Posts 5.3.2 and earlier allows remote authenticated users to inject scripts. The developer and JVN have not published the affected parameter, code locus, or missing neutralization operation. An authenticated account is required, and exploitation executes the injected script when an administrator views the affected content.

The record

CVE
CVE-2021-20746
Published
Jun 28, 2021
Updated
Aug 3, 2024
Vendor
Hector Cabrera
Product
WP Popular Posts
Classifications
CWE-79
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 28, 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=5.3.2 and earlier

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Hector Cabrera · WP Popular Postsversion=5.3.2 and earlier

Published CVSS scores

3.5JPCERT/CCAV:N/AC:M/Au:S/C:N/I:P/A:N
5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
6.4WordfenceCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
5.4JPCERT/CCCVSS:3.0/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 exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Public exploit references

No public exploit references are available in this record.

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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