CVE-2020-20696Public exploitNetwork attack vector

Browser script execution via unencoded post tags

Published Sep 27, 2021 · Updated Aug 4, 2024

Stored XSS in GilaCMS 1.11.4 allows remote authenticated users to execute scripts in another user's browser through a post's Tags field. The /admin/content/post workflow stores crafted Tags content without output encoding and renders it when the public post is accessed. Exploitation requires post-authoring access and a victim to view the published post, exposing the victim's browser session to attacker-controlled script behavior.

CVSS severity5.4
Medium
EPSS probability0.49%
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 GilaCMS 1.11.4 allows remote authenticated users to execute scripts in another user's browser through a post's Tags field. The /admin/content/post workflow stores crafted Tags content without output encoding and renders it when the public post is accessed. Exploitation requires post-authoring access and a victim to view the published post, exposing the victim's browser session to attacker-controlled script behavior.

The record

CVE
CVE-2020-20696
Published
Sep 27, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1189
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 27, 2021CVE 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

5.4GitHub Advisory DatabaseCVSS: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')
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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