VulnerabilityPublished 9 Sep 2025

CVE-2025-59014: TYPO3 CMS · CWE-248

Affects TYPO3 CMSSource CVE Database V5

Not known to be exploited · CVSS 5.1 Medium.

Data as of 26 Oct 2026, 14:05 UTC

CVSS 4.0 base score

5.1Medium

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

EPSS: 0.2% chance of exploitation in 30 days – higher than 21% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

Attack Vector: Network
Attack Complexity: Low
Attack Requirements: None
Privileges Required: High
User Interaction: None
Vulnerable system confidentiality: None
Vulnerable system integrity: None
Vulnerable system availability: Low
Subsequent system confidentiality: None
Subsequent system integrity: None
Subsequent system availability: None

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

Attack Vector: Network: The vulnerable system is bound to the network stack and the set of possible attackers extends beyond the other options listed below, 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: The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system.
Attack Requirements: None: The successful attack does not depend on the deployment and execution conditions of the vulnerable system. The attacker can expect to be able to reach the vulnerability and execute the exploit under all or most instances of the vulnerability.
Privileges Required: High: The attacker requires privileges that provide significant (e.g., administrative) control over the vulnerable system allowing full access to the vulnerable system’s settings and files.
User Interaction: None: The vulnerable system can be exploited without interaction from any human user, other than the attacker.
Vulnerable system confidentiality: None: There is no loss of confidentiality within the Vulnerable System.
Vulnerable system integrity: None: There is no loss of integrity within the Vulnerable System.
Vulnerable system availability: Low: Performance is reduced or there are interruptions in resource availability. Even if repeated exploitation of the vulnerability is possible, the attacker does not have the ability to completely deny service to legitimate users. The resources in the Vulnerable System are either partially available all of the time, or fully available only some of the time, but overall there is no direct, serious consequence to the Vulnerable System.
Subsequent system confidentiality: None: There is no loss of confidentiality within the Subsequent System or all confidentiality impact is constrained to the Vulnerable System.
Subsequent system integrity: None: There is no loss of integrity within the Subsequent System or all integrity impact is constrained to the Vulnerable System.
Subsequent system availability: None: There is no impact to availability within the Subsequent System or all availability impact is constrained to the Vulnerable System.

Definitions: FIRST CVSS v4.0 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 9 Sep 2025
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 26 Oct 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.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, 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.

What to do

Affected software

Product	Affected	Fixed in
TYPO3 TYPO3 CMS	Affected =11.0.0 =12.0.0 =13.0.0	Fixed in–

AI-suggested

To mitigate CVE-2025-59014, European organizations should: 1) Monitor TYPO3 CMS vendor communications closely for official patches or updates addressing this vulnerability and apply them promptly once available. 2) Restrict administrator-level access strictly to trusted personnel and enforce strong authentication mechanisms, such as multi-factor authentication (MFA), to reduce the risk of credential compromise. 3) Implement logging and monitoring of backend user activities, especially changes to the bookmark toolbar or other administrative UI components, to detect anomalous or manipulated data inputs. 4) Conduct regular security audits and code reviews of custom TYPO3 extensions or configurations that interact with the bookmark toolbar to ensure no additional vulnerabilities or unsafe data handling exist. 5) Consider temporary administrative process controls, such as limiting the ability to save bookmark toolbar data or isolating administrative functions during critical periods, until patches are applied. 6) Educate administrators about the risks of manipulating bookmark toolbar data and encourage cautious handling of backend UI features. These steps go beyond generic advice by focusing on controlling administrator privileges, monitoring specific UI components involved in the vulnerability, and preparing for patch deployment.

Description

An uncaught exception in the Bookmark Toolbar of TYPO3 CMS versions 11.0.0–11.5.47, 12.0.0–12.4.36, and 13.0.0–13.4.17 lets administrator‑level backend users trigger a denial‑of‑service condition in the backend user interface by saving manipulated data in the bookmark toolbar.

Impact

For European organizations using TYPO3 CMS, this vulnerability poses a risk primarily to the availability of the backend administrative interface. TYPO3 is a widely used open-source content management system in Europe, especially in Germany and other German-speaking countries, as well as in public sector and enterprise environments. Disruption of the backend interface can delay content updates, security patching, and administrative controls, which may indirectly increase exposure to other threats. Since exploitation requires administrator-level access, the threat is more relevant in scenarios where insider threats exist or where administrator credentials have been compromised. The denial-of-service condition could also be leveraged as part of a broader attack to disrupt website management during critical periods, such as product launches or regulatory compliance deadlines. While the vulnerability does not directly expose confidential data or allow privilege escalation, the interruption of administrative functions can degrade operational integrity and availability, impacting business continuity and reputation. Organizations relying heavily on TYPO3 for their web presence or intranet portals should consider this vulnerability significant enough to warrant prompt attention.

References

typo3.org/security/advisory/typo3-core-sa-2025-018 (opens in a new tab)

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 9 Sep 2025, 09:06 UTC

WeaknessesCWE-248

Technical details

References

Community reviews

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