CVE-2021-34636Network attack vector

Stored script injection via nonce-free theme saves

Published Sep 28, 2021 · Updated Mar 31, 2025

CSRF in WpDevArt Countdown and CountUp, WooCommerce Sales Timer 1.5.7 and earlier allows remote attackers to inject stored scripts. The save_theme function in includes/admin/coundown_theme_page.php accepts theme-setting requests without verifying a WordPress nonce, then stores attacker-supplied script content. Exploitation requires a logged-in administrator to visit attacker-controlled content; the stored script executes in a later browser view under that site's origin.

CVSS severity8.8
High
EPSS probability0.63%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

CSRF in WpDevArt Countdown and CountUp, WooCommerce Sales Timer 1.5.7 and earlier allows remote attackers to inject stored scripts. The save_theme function in includes/admin/coundown_theme_page.php accepts theme-setting requests without verifying a WordPress nonce, then stores attacker-supplied script content. Exploitation requires a logged-in administrator to visit attacker-controlled content; the stored script executes in a later browser view under that site's origin.

The record

CVE
CVE-2021-34636
Published
Sep 28, 2021
Updated
Mar 31, 2025
Vendor
WpDevArt
Product
Countdown and CountUp, WooCommerce Sales Timer
Classifications
CWE-352, T1059.007
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 28, 2021CVE publishedPublication date reported by the CVE source.
  2. Mar 31, 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=1.5.7 <=1.5.7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

WpDevArt · Countdown and CountUp, WooCommerce Sales Timerversion=1.5.7 <=1.5.7

Published CVSS scores

8.8WordfenceCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
6.8NIST NVDAV:N/AC:M/Au:N/C:P/I:P/A:P

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-352Cross-Site Request Forgery (CSRF)
T1059.007JavaScript/JScript

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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