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CVE-2025-8550

30
FAUCET Score

CVE-2025-8550 describes a cross-site scripting (XSS) vulnerability in atjiu pybbs versions up to 6.0.0, specifically within the /admin/topic/list functionality when manipulating the Username argument. This medium-severity vulnerability (CVSS 5.4) can be exploited remotely with low attack complexity, potentially leading to limited confidentiality and integrity impacts. An exploit for this issue has been publicly disclosed via ExploitDB (EDB-52400), though there is no evidence of active exploitation or significant community discussion. A patch (2fe4a51afbce0068c291bc1818bbc8f7f3b01a22) is available to remediate this weakness.

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

1.9LOW

CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/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
HIGH
User Interaction
PASSIVE
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
0.63%
Probability of exploitation in next 30 days
EPSS Percentile
46.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
ExploitDB: EDB-52400 · Aug 11, 2025
This CVE's current EPSS score of 0.0063 is in the 77th percentile among its peer group of 15,224 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 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/2fe4a51afbce0068c291bc1818bbc8f7f3b01a22
Patch
github.com / atjiu/pybbs/issues/203
ExploitIssue Tracking
github.com / atjiu/pybbs/issues/203
ExploitIssue Tracking
github.com / atjiu/pybbs/issues/203
Issue Tracking
vuldb.com
Permissions RequiredVDB Entry
vuldb.com
Third Party AdvisoryVDB Entry
vuldb.com
Third Party AdvisoryVDB Entry