CVE-2020-11001Network attack vector

Stored XSS via unescaped StreamField comparisons

Published Apr 14, 2020 · Updated Nov 19, 2024

Stored XSS in Wagtail before 2.7.2 and 2.8.0 allows remote authenticated users to execute script through page revision comparisons. The StreamField BlockComparison.htmlvalue path returned editor-supplied block rendering as HTML without extracting and escaping its text. A limited-permission editor must craft a revision and a higher-privileged admin user must view the comparison, enabling actions with that viewer's credentials.

CVSS severity5.8
Medium
EPSS probability1.27%
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 Wagtail before 2.7.2 and 2.8.0 allows remote authenticated users to execute script through page revision comparisons. The StreamField BlockComparison.htmlvalue path returned editor-supplied block rendering as HTML without extracting and escaping its text. A limited-permission editor must craft a revision and a higher-privileged admin user must view the comparison, enabling actions with that viewer's credentials.

The record

CVE
CVE-2020-11001
Published
Apr 14, 2020
Updated
Nov 19, 2024
Vendor
Wagtail
Product
Wagtail
Classifications
CWE-80, CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 14, 2020CVE publishedPublication date reported by the CVE source.
  2. Nov 19, 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=< 2.7.2
  2. Affected versionversion=>= 2.8.0, < 2.8.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Wagtail · Wagtailversion=< 2.7.2; version=>= 2.8.0, < 2.8.1

Published CVSS scores

3.5NIST NVDAV:N/AC:M/Au:S/C:N/I:P/A:N
5.8GitHub, Inc.CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:N/A:N
6.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:N/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-80Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007JavaScript/JScript

Public exploit references

No public exploit references are available in this record.

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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