CVE-2021-24991Public exploitNetwork attack vector

Reflected XSS via unescaped admin-page parameters

Published Jan 3, 2022 · Updated Aug 3, 2024

Reflected XSS in WP Overnight PDF Invoices & Packing Slips for WooCommerce before 2.10.5 allows attackers to run script in an admin browser. The admin settings page reads the tab and section query parameters and places them unescaped into HTML attributes, permitting injected event handlers. Exploitation requires an administrator to open a crafted URL while signed in; the injected script runs in the WordPress admin origin with that user's privileges.

CVSS severity4.8
Medium
EPSS probability1.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in WP Overnight PDF Invoices & Packing Slips for WooCommerce before 2.10.5 allows attackers to run script in an admin browser. The admin settings page reads the tab and section query parameters and places them unescaped into HTML attributes, permitting injected event handlers. Exploitation requires an administrator to open a crafted URL while signed in; the injected script runs in the WordPress admin origin with that user's privileges.

The record

CVE
CVE-2021-24991
Published
Jan 3, 2022
Updated
Aug 3, 2024
Vendor
WP Overnight
Product
PDF Invoices & Packing Slips for WooCommerce
Classifications
CWE-79, T1204.001
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Jan 3, 2022CVE 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=2.10.5 <2.10.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

WP Overnight · PDF Invoices & Packing Slips for WooCommerceversion=2.10.5 <2.10.5

Published CVSS scores

4.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
3.5NIST NVDAV:N/AC:M/Au:S/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.

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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1204.001User Execution: Malicious Link

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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