CVE-2020-8825Public exploitNetwork attack vector

Stored script execution via unsanitized branding input

Published Feb 10, 2020 · Updated Aug 4, 2024

Stored XSS in Vanilla 2.6.3 allows remote authenticated users to execute script in another user's browser through the branding page. The branding settings endpoint stores user-supplied branding content without sufficient sanitization and renders it when the page is opened. Successful exploitation requires access to branding settings and a victim to view the stored page, enabling browser-context data theft or page alteration.

CVSS severity5.4
Medium
EPSS probability1.88%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Vanilla 2.6.3 allows remote authenticated users to execute script in another user's browser through the branding page. The branding settings endpoint stores user-supplied branding content without sufficient sanitization and renders it when the page is opened. Successful exploitation requires access to branding settings and a victim to view the stored page, enabling browser-context data theft or page alteration.

The record

CVE
CVE-2020-8825
Published
Feb 10, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 10, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

3.5NIST NVDAV:N/AC:M/Au:S/C:N/I:P/A:N
5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/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.

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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
Privilegesauthenticated
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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