CVE-2024-34537VulnerabilityPublished 28 Oct 2024Updated 31 Oct 2024

CVE-2024-34537: typo3 · n/a

Affects typo3Source CVE Database V5

Not known to be exploited · CVSS 4.9 Medium · fixed in 13.3.1 : update typo3 when convenient.

Data as of 25 Oct 2026, 19:02 UTC

CVSS 3.1 base score

4.9Medium

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

EPSS: 0.7% chance of exploitation in 30 days – higher than 53% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 13.3.1, 12.4.21, 11.5.40 +1

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

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

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: High: The attacker is authorized with (i.e., requires) privileges that provide significant (e.g., administrative) control over the vulnerable component that could affect component-wide settings and files.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: None: There is no loss of confidentiality within the impacted component.
Integrity: None: There is no loss of integrity within the impacted component.
Availability: High: There is total loss of availability, resulting in the attacker being able to fully deny access to resources in the impacted component; this loss is either sustained (while the attacker continues to deliver the attack) or persistent (the condition persists even after the attack has completed). Alternatively, the attacker has the ability to deny some availability, but the loss of availability presents a direct, serious consequence to the impacted component (e.g., the attacker cannot disrupt existing connections, but can prevent new connections; the attacker can repeatedly exploit a vulnerability that, in each instance of a successful attack, leaks a only small amount of memory, but after repeated exploitation causes a service to become completely unavailable).

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 28 Oct 2024
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

Upgrade typo3/typo3 to 13.3.1, 12.4.21, 11.5.40 or 10.4.46.

Affected software

Product	Affected	Fixed in
GitHubtypo3/typo3`pkg:github/typo3/typo3`Other threats	Affected <10.4.46 <11.5.40 <12.4.21 <13.3.1	Fixed in 10.4.46 11.5.40 12.4.21 13.3.1

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

To mitigate CVE-2024-34537, organizations should promptly upgrade TYPO3 CMS installations to the fixed versions: 10.4.46 ELTS, 11.5.40 LTS, 12.4.21 LTS, or 13.3.1 and later. Restrict administrator backend access to trusted personnel and enforce strong authentication mechanisms to reduce the risk of account compromise. Implement monitoring and alerting on backend user activities to detect unusual bookmark toolbar modifications or other suspicious behavior. Regularly audit administrator accounts and permissions to ensure only necessary privileges are granted. Consider network segmentation and access controls to limit backend interface exposure to trusted networks. In environments where immediate patching is not feasible, temporarily disabling or restricting the bookmark toolbar feature could reduce exposure. Maintain up-to-date backups and incident response plans to quickly recover from potential denial of service incidents. Finally, stay informed on TYPO3 security advisories for any updates or emerging threats related to this vulnerability.

Description

TYPO3 before 13.3.1 allows denial of service (interface error) in the Bookmark Toolbar (ext:backend), exploitable by an administrator-level backend user account via manipulated data saved in the bookmark toolbar of the backend user interface. The fixed versions are 10.4.46 ELTS, 11.5.40 LTS, 12.4.21 LTS, and 13.3.1.

Impact

The primary impact of CVE-2024-34537 is a denial of service condition affecting the availability of the TYPO3 backend interface, specifically the bookmark toolbar functionality. For organizations relying on TYPO3 CMS for website management, this could temporarily disrupt administrative operations, delaying content updates or configuration changes. Since exploitation requires administrator-level access, the threat is limited to insiders or attackers who have already compromised an admin account. However, if an attacker gains such access, they could leverage this vulnerability to degrade service and potentially cause operational disruptions. The vulnerability does not expose sensitive data or allow unauthorized data modification, limiting its impact to availability. Organizations with large TYPO3 deployments or critical web infrastructure managed via TYPO3 could face operational downtime or increased administrative overhead during incident response. The absence of known exploits reduces immediate risk but does not eliminate the need for timely patching.

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 28 Feb 2026, 03:14 UTC

Technical details

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