CVE-2021-24274Public exploitNetwork attack vector

Script execution via unsanitized options tab attribute

Published May 5, 2021 · Updated Aug 3, 2024

Reflected XSS in Ultimate Maps by Supsystic before 1.2.5 allows remote attackers to execute script via a crafted options-page URL. The plugin writes the unsanitized tab parameter into an HTML attribute on its options page, allowing injected event-handler attributes to execute. Execution requires an authenticated WordPress administrator to follow the crafted link, exposing data and actions available to that browser session.

CVSS severity6.1
Medium
EPSS probability17.64%
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 Ultimate Maps by Supsystic before 1.2.5 allows remote attackers to execute script via a crafted options-page URL. The plugin writes the unsanitized tab parameter into an HTML attribute on its options page, allowing injected event-handler attributes to execute. Execution requires an authenticated WordPress administrator to follow the crafted link, exposing data and actions available to that browser session.

The record

CVE
CVE-2021-24274
Published
May 5, 2021
Updated
Aug 3, 2024
Vendor
Supsystic
Product
Ultimate Maps by Supsystic
Classifications
CWE-79, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 5, 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=1.2.5 <1.2.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Supsystic · Ultimate Maps by Supsysticversion=1.2.5 <1.2.5

Published CVSS scores

6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
4.3NIST NVDAV:N/AC:M/Au:N/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
Privilegesunauthenticated
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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