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CVE-2018-15581

21
FAUCET Score

CVE-2018-15581 is a Cross-Site Scripting (XSS) vulnerability in gnuboard5 versions prior to 5.3.1.6, specifically within the adm/faqmasterformupdate.php component. This allows remote attackers to inject arbitrary web script or HTML into affected systems. With a CVSS score of 6.1 (Medium), exploitation requires user interaction (UI:R) but has low attack complexity (AC:L) and can lead to limited confidentiality and integrity impacts (C:L/I:L). There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
< 5.3.1.6CPE matchmatch criteria
cpe:2.3:a:sir:gnuboard:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

6.1MEDIUM

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
2.7
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.06%
Probability of exploitation in next 30 days
EPSS Percentile
60.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0106 is in the 73rd percentile among its peer group of 26,234 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 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 / gnuboard/gnuboard5/commit/b1fc952c7600b825c4b02e2789ddafdea18c8d13
PatchThird Party Advisory