CVE-2021-34635Network attack vector

Reflected XSS via unsanitized mcount parameter

Published Aug 2, 2021 · Updated Sep 17, 2024

Reflected XSS in AYS Pro Plugins Poll Maker 3.2.8 and earlier allows remote attackers to execute scripts via the mcount parameter. The plugin's settings page reads mcount from the request and places it into generated administration-page output without context-appropriate escaping. Exploitation requires an administrator to open a crafted settings-page URL, after which attacker-controlled script runs in that administrator's browser session.

CVSS severity6.1
Medium
EPSS probability0.94%
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 AYS Pro Plugins Poll Maker 3.2.8 and earlier allows remote attackers to execute scripts via the mcount parameter. The plugin's settings page reads mcount from the request and places it into generated administration-page output without context-appropriate escaping. Exploitation requires an administrator to open a crafted settings-page URL, after which attacker-controlled script runs in that administrator's browser session.

The record

CVE
CVE-2021-34635
Published
Aug 2, 2021
Updated
Sep 17, 2024
Vendor
AYS Pro Plugins
Product
Poll Maker
Classifications
CWE-79, T1203, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 2, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 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=3.2.8 <=3.2.8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

AYS Pro Plugins · Poll Makerversion=3.2.8 <=3.2.8

Published CVSS scores

4.3NVDAV:N/AC:M/Au:N/C:N/I:P/A:N
6.1WordfenceCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
6.1NVDCVSS:3.1/AV:N/AC:L/PR:N/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution
T1204.001User Execution: Malicious Link

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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