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CVE-2025-8547

20
FAUCET Score

CVE-2025-8547 is a critical improper authorization vulnerability affecting the Email Verification Handler component in atjiu pybbs up to version 6.0.0. This flaw allows remote attackers to manipulate the email verification process, potentially leading to unauthorized actions. While rated as MEDIUM severity (CVSS 5.3) due to its low impact on integrity and no impact on confidentiality or availability, the vulnerability is easily exploitable over the network without user interaction. A patch (044f22893bee254dc2bb0d30f614913fab3c22c2) has been released, and the exploit has been publicly disclosed, though there is no evidence of active exploitation, readily available exploit code in common frameworks, or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 6.0.0CPE matchmatch criteria
cpe:2.3:a:pybbs_project:pybbs:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 4.0

5.5MEDIUM

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
VS Confidentiality
NONE
VS Integrity
LOW
VS Availability
NONE
SS Confidentiality
NONE
SS Integrity
NONE
SS Availability
NONE
Exploit Maturity
PROOF_OF_CONCEPT
CvssVersion
4.0

Exploit Intelligence

EPSS Score
0.40%
Probability of exploitation in next 30 days
EPSS Percentile
32.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0040 is in the 20th percentile among its peer group of 23,705 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

github.com / atjiu/pybbs/commit/044f22893bee254dc2bb0d30f614913fab3c22c2
Patch
github.com / atjiu/pybbs/issues/200
ExploitIssue Tracking
github.com / atjiu/pybbs/issues/200
ExploitIssue Tracking
github.com / atjiu/pybbs/issues/200
Issue Tracking
vuldb.com
Permissions RequiredVDB Entry
vuldb.com
Third Party AdvisoryVDB Entry
vuldb.com
Third Party AdvisoryVDB Entry