VDB-318676 · Submit #622180 · CVE-2025-8547

atjiu pybbs up to 6.0.0 Email Verification improper authorization

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.0	$0-$5k	0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in atjiu pybbs up to 6.0.0. The affected element is an unknown function of the component Email Verification Handler. Executing a manipulation can lead to improper authorization. This vulnerability is handled as CVE-2025-8547. The attack can be executed remotely. Additionally, an exploit exists. It is advisable to implement a patch to correct this issue.

Detailsinfo

A vulnerability has been found in atjiu pybbs up to 6.0.0 and classified as critical. This vulnerability affects an unknown functionality of the component Email Verification Handler. The manipulation with an unknown input leads to a improper authorization vulnerability. The CWE definition for the vulnerability is CWE-285. The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. As an impact it is known to affect integrity.

The advisory is shared for download at github.com. This vulnerability was named CVE-2025-8547. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details are unknown but a public exploit is available. The MITRE ATT&CK project declares the attack technique as T1548.002.

It is possible to download the exploit at github.com. It is declared as proof-of-concept.

Applying the patch 044f22893bee254dc2bb0d30f614913fab3c22c2 is able to eliminate this problem. The bugfix is ready for download at github.com.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

atjiu

Name

pybbs

Version

License

open-source

Website

Product: https://github.com/atjiu/pybbs/

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: 5.3
VulDB Meta Temp Score: 5.0

VulDB Base Score: 5.3
VulDB Temp Score: 4.8
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 5.3
CNA Vector: 🔒

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Improper authorization
CWE: CWE-285 / CWE-266
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔒

Patch: 044f22893bee254dc2bb0d30f614913fab3c22c2

Timelineinfo

08/04/2025 Advisory disclosed
08/04/2025 +0 days VulDB entry created
08/05/2025 +1 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: 200
Status: Confirmed
Confirmation: 🔒

CVE: CVE-2025-8547 (🔒)
GCVE (CVE): GCVE-0-2025-8547
GCVE (VulDB): GCVE-100-318676
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 08/04/2025 15:10
Updated: 08/05/2025 14:49
Changes: 08/04/2025 15:10 (59), 08/05/2025 11:36 (31), 08/05/2025 14:49 (1)
Complete: 🔍
Submitter: ZAST.AI
Cache ID: 216::103

Submitinfo

Accepted

Submit #622180: atjiu https://github.com/atjiu/pybbs <=6.0.0 Registration email is not verified (by ZAST.AI)