CVE-2026-22875VulnerabilityPublished 4 Feb 2026

CVE-2026-22875: Six Apart Movable Type (Software Edition) · Cross-site scripting (XSS)

Affects Six Apart Movable Type (Software Edition)Source CVE Database V5

Not known to be exploited · CVSS 5.4 Medium.

Data as of 25 Oct 2026, 19:02 UTC

CVSS 3.0 base score

5.4Medium

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.2% chance of exploitation in 30 days – higher than 15% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Attack Vector: Network
Attack Complexity: Low
Privileges Required: Low
User Interaction: Required
Scope: Changed
Confidentiality: Low
Integrity: Low
Availability: None

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: Low: The attacker is authorized with (i.e., requires) privileges that provide basic user capabilities that could normally affect only settings and files owned by a user. Alternatively, an attacker with Low privileges may have the ability to cause an impact only to non-sensitive resources.
User Interaction: Required: Successful exploitation of this vulnerability requires a user to take some action before the vulnerability can be exploited.
Scope: Changed: An exploited vulnerability can affect resources beyond the security scope managed by the security authority of the vulnerable component. In this case, the vulnerable component and the impacted component are different and managed by different security authorities.
Confidentiality: Low: There is some loss of confidentiality. Access to some restricted information is obtained, but the attacker does not have control over what information is obtained, or the amount or kind of loss is limited. The information disclosure does not cause a direct, serious loss to the impacted component.
Integrity: Low: Modification of data is possible, but the attacker does not have control over the consequence of a modification, or the amount of modification is limited. The data modification does not have a direct, serious impact on the impacted component.
Availability: None: There is no impact to availability within the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 4 Feb 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: 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 2026-10-25.

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.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC 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.

What to do

Affected software

Product	Affected	Fixed in
Six Apart Ltd.Movable Type (Software Edition)	Affected =9.0.4 to 9.0.5 (9.0 series) =8.8.0 to 8.8.1 (8.8 series) =8.0.2 to 8.0.8 (8.0 series)	Fixed in–
Six Apart Ltd.Movable Type Advanced (Software Edition)	Affected =9.0.4 to 9.0.5 (9.0 series) =8.8.0 to 8.8.1 (8.8 series) =8.0.2 to 8.0.8 (8.0 series)	Fixed in–
Six Apart Ltd.Movable Type Premium (Software Edition)	Affected =9.0.4 (MTP 9.0 series) =2.13 and earlier (MTP 2 series)	Fixed in–
Six Apart Ltd.Movable Type Premium (Advanced Edition) (Software Edition)	Affected =9.0.4 (MTP 9.0 series) =2.13 and earlier (MTP 2 series)	Fixed in–
Six Apart Ltd.Movable Type (Cloud Edition)	Affected =9.0.5 (9 series) =8.8.1 (8 series)	Fixed in–
Six Apart Ltd.Movable Type Premium (Cloud Edition)	Affected =9.0.5 (9 series) =2.12 (MTP 2 series)	Fixed in–

AI-suggested

Organizations should immediately identify all instances of Movable Type in their environment and verify the version in use. Upgrading to the latest patched versions beyond 9.0.5 or applying vendor-provided patches (once available) is the most effective mitigation. For End-of-Life versions, consider migrating to supported releases or alternative platforms. In the interim, implement strict input validation and sanitization on all user inputs related to the Export Sites feature to prevent malicious script injection. Restrict access to the Export Sites functionality to trusted users only and enforce the principle of least privilege to minimize the risk of an attacker gaining the necessary authentication level. Employ Content Security Policy (CSP) headers to limit the impact of potential XSS payloads. Regularly audit logs for suspicious activity related to Export Sites and monitor for anomalous user behavior. Educate users about the risks of clicking on unexpected links or executing unknown scripts within the application context. Finally, consider deploying web application firewalls (WAFs) with rules tailored to detect and block XSS attempts targeting Movable Type.

Description

CVE-2026-22875 is a stored cross-site scripting (XSS) vulnerability affecting Six Apart Ltd. 's Movable Type (Software Edition) versions 8.0.2 to 8.0.8, 8.8.0 to 8.8.1, and 9.

Impact

For European organizations, this vulnerability poses a risk of unauthorized script execution within the context of authenticated users, potentially leading to session hijacking, theft of sensitive information, or unauthorized actions on web portals managed by Movable Type. Given that Movable Type is used for content management and website publishing, exploitation could result in defacement, data leakage, or disruption of web services. The impact is heightened in environments where multiple users have elevated privileges or where sensitive data is accessible through the affected application. Additionally, organizations using End-of-Life versions face increased risk due to lack of official patches and support. The medium severity rating suggests moderate risk, but the potential for lateral movement or privilege escalation through chained attacks should not be underestimated. European entities with public-facing websites or intranet portals running vulnerable Movable Type versions are particularly at risk, especially if they do not enforce strict access controls or input validation.

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 11 Feb 2026, 12:06 UTC

Technical details

References

Community reviews

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