CVE-2026-121862VulnerabilityPublished 11 Nov 2026

The Knowledge Building WordPress plugin before 0.7.3 does not sanitise and escape comments submitted through its reply

Source GCVE Database

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Authoritative record:CVE-2026-121862· High

Not known to be exploited : upgrade to 0.7.3 soon.

Data as of 11 Nov 2026, 07:20 UTC

Severity

High

Rated High by Threat Radar's AI analysis · CVSS not yet scored by NVD

Thin evidence

One scorer or none

Patch: Available – fixed in 0.7.3

Exploitation evidence

Disclosed: evidence found.
CVE published 11 Nov 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 10 Nov 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

ghsa-vxm8-8rj5-3798

What to do

Upgrade Knowledge Building (WordPress plugin) to 0.7.3.

Affected software

Product	Affected	Fixed in
Knowledge Building	Affected <0.7.3	Fixed in 0.7.3

AI-suggested

Upgrade the Knowledge Building WordPress plugin to version 0.7.3 or later, where this vulnerability has been fixed. If you cannot patch yet, consider disabling the reply feature or implementing manual moderation of comments to prevent untrusted content from being published.

Description

The Knowledge Building WordPress plugin versions before 0.7.3 contain a vulnerability where comments submitted through the reply feature are not properly sanitized or escaped. This flaw allows unauthenticated users to inject stored cross-site scripting (XSS) payloads, which are then published without moderation. As a result, any visitor to the affected posts, including administrators, can be subjected to these XSS attacks.

Impact

Stored cross-site scripting vulnerabilities allow attackers to execute arbitrary scripts in the context of the affected website. In this case, unauthenticated users can inject malicious scripts that execute when any visitor, including administrators, views the affected posts. This can lead to session hijacking, defacement, or other malicious actions within the context of the user's browser session on the site.

References

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