CVE-2021-24956Public exploitNetwork attack vector

Administrator script execution via unescaped date parameter

Published Dec 21, 2021 · Updated Aug 3, 2024

Reflected XSS in Adenion GmbH Blog2Social before 6.8.7 allows remote attackers to execute script in an administrator's browser. The admin-page handler reflects the b2sShowByDate query parameter into HTML without sanitizing or escaping it. A targeted administrator must open a crafted link while able to access the plugin's admin page; the injected script then reads or modifies data available to that page.

CVSS severity6.1
Medium
EPSS probability1.44%
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 Adenion GmbH Blog2Social before 6.8.7 allows remote attackers to execute script in an administrator's browser. The admin-page handler reflects the b2sShowByDate query parameter into HTML without sanitizing or escaping it. A targeted administrator must open a crafted link while able to access the plugin's admin page; the injected script then reads or modifies data available to that page.

The record

CVE
CVE-2021-24956
Published
Dec 21, 2021
Updated
Aug 3, 2024
Vendor
Adenion GmbH
Product
Blog2Social
Classifications
CWE-79, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 21, 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=6.8.7 <6.8.7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Adenion GmbH · Blog2Socialversion=6.8.7 <6.8.7

Published CVSS scores

6.1WordfenceCVSS: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 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')
T1204.001Malicious 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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