CVE-2021-24746Public exploitNetwork attack vector

Reflected XSS via unescaped post URL

Published Mar 28, 2022 · Updated Aug 3, 2024

Reflected XSS in Heateor Support Sassy Social Share before 3.3.40 allows remote attackers to execute script via a crafted post URL. The plugin inserts the viewed post URL into an onclick attribute without escaping it, so quote and tag characters become executable markup. The default-enabled More icon exposes the path, but a victim must open the crafted URL; injected script then runs in that visitor's browser context.

CVSS severity6.1
Medium
EPSS probability2.24%
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 Heateor Support Sassy Social Share before 3.3.40 allows remote attackers to execute script via a crafted post URL. The plugin inserts the viewed post URL into an onclick attribute without escaping it, so quote and tag characters become executable markup. The default-enabled More icon exposes the path, but a victim must open the crafted URL; injected script then runs in that visitor's browser context.

The record

CVE
CVE-2021-24746
Published
Mar 28, 2022
Updated
Aug 3, 2024
Vendor
Heateor Support
Product
Sassy Social Share
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 28, 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=3.3.40 <3.3.40

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Heateor Support · Sassy Social Shareversion=3.3.40 <3.3.40

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')
T1203Exploitation for Client Execution

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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