CVE-2022-43707Network attack vector

Persistent XSS via malformed visual-editor output

Published Nov 21, 2022 · Updated Apr 29, 2025

Persistent XSS in MyBB before 1.8.32 allows remote attackers to run injected script when a victim opens the visual MyCode editor. Bundled SCEditor 2.1.3 incorrectly parses attacker-controlled or stored MyCode into malformed HTML instead of safely neutralizing it. Exploitation requires a victim to load an editor-enabled page, including parameter-prefilled content or a reply quoting a stored malicious message; the injected code runs in that victim's browser context.

CVSS severity6.1
Medium
EPSS probability0.48%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Persistent XSS in MyBB before 1.8.32 allows remote attackers to run injected script when a victim opens the visual MyCode editor. Bundled SCEditor 2.1.3 incorrectly parses attacker-controlled or stored MyCode into malformed HTML instead of safely neutralizing it. Exploitation requires a victim to load an editor-enabled page, including parameter-prefilled content or a reply quoting a stored malicious message; the injected code runs in that victim's browser context.

The record

CVE
CVE-2022-43707
Published
Nov 21, 2022
Updated
Apr 29, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 21, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 29, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
6.1CISA-ADPCVSS: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 exploitUnconfirmed

Weakness, pattern, technique

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

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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