CVE-2022-1503Public exploitNetwork attack vector

Stored XSS via unfiltered page content

Published Apr 27, 2022 · Updated Apr 15, 2025

Stored XSS in GetSimple CMS allows remote authenticated users to inject script through post-content in the Content Module. The /admin/edit.php handler saves post-content without filtering embedded script, causing it to execute when the published page is viewed. An authenticated backend session and a later page view are required, and the injected script runs in that visitor's browser context.

CVSS severity3.5
Low
EPSS probability0.66%
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 GetSimple CMS allows remote authenticated users to inject script through post-content in the Content Module. The /admin/edit.php handler saves post-content without filtering embedded script, causing it to execute when the published page is viewed. An authenticated backend session and a later page view are required, and the injected script runs in that visitor's browser context.

The record

CVE
CVE-2022-1503
Published
Apr 27, 2022
Updated
Apr 15, 2025
Vendor
GetSimple CMS
Product
GetSimple CMS
Classifications
CWE-79, T1189
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 27, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 15, 2025Record 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=n/a

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

GetSimple CMS · GetSimple CMSversion=n/a

Published CVSS scores

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

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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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1189Drive-by Compromise

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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