TYPO3 Forum up to 6.2.3 Topic Editing privileges management

CVSS Meta Temp Score
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CTI Interest Score
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5.2$0-$5k0.31-

Summaryinfo

A vulnerability was found in TYPO3 Forum up to 6.2.3. It has been rated as problematic. Affected by this issue is some unknown functionality of the component Topic Editing. Performing a manipulation results in privileges management. This vulnerability is cataloged as CVE-2026-77143. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in TYPO3 Forum up to 6.2.3. It has been classified as problematic. This affects an unknown function of the component Topic Editing. The manipulation with an unknown input leads to a privileges management vulnerability. CWE is classifying the issue as CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. This is going to have an impact on integrity, and availability. The summary by CVE is:

The frontend topic editing flow does not verify on the server side that the requesting visitor owns the topic being modified. As a result, a visitor who knows the identifier of a topic from the public forum can submit a modified update request for that topic directly and overwrite its content, without the application confirming ownership. Topic identifiers are visible in the public forum listing, and exploitation requires no privileged access or non-default configuration.

The advisory is shared at typo3.org. This vulnerability is uniquely identified as CVE-2026-77143 since 08/20/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1068 for this issue.

Upgrading to version 6.2.4 eliminates this vulnerability.

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Productinfo

Type

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.2

VulDB Base Score: 5.4
VulDB Temp Score: 5.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Privileges management
CWE: CWE-269 / CWE-266
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Forum 6.2.4

Timelineinfo

08/20/2026 CVE reserved
08/25/2026 +5 days Advisory disclosed
08/25/2026 +0 days VulDB entry created
08/25/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: typo3.org
Status: Confirmed

CVE: CVE-2026-77143 (🔒)
GCVE (CVE): GCVE-0-2026-77143
GCVE (VulDB): GCVE-100-394989

Entryinfo

Created: 08/25/2026 11:29
Changes: 08/25/2026 11:29 (67)
Complete: 🔍
Cache ID: 216::103

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