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CVE-2018-18676

22
FAUCET Score

CVE-2018-18676 describes a reflected Cross-Site Scripting (XSS) vulnerability in GNUBOARD5 version 5.3.1.9, specifically affecting the "mobile board tail contents" parameter (bo_mobile_content_tail) within adm/board_form_update.php. This allows remote attackers to inject arbitrary web scripts or HTML. The vulnerability has a CVSS v3 score of 6.1 (Medium), indicating a network-based attack with low complexity, requiring user interaction, and potentially leading to low impact on confidentiality and integrity. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
5.3.1.9CPE matchmatch criteria
cpe:2.3:a:sir:gnuboard:5.3.1.9:*:*:*:*:*:*:*

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
1.55%
Probability of exploitation in next 30 days
EPSS Percentile
72.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0155 is in the 85th percentile among its peer group of 26,236 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/a45241f4bc46aee1ab2cc0749f6444b043681edf
PatchThird Party Advisory
github.com / gnuboard/gnuboard5/compare/15b2e73...2549172
PatchThird Party Advisory
github.com / gnuboard/gnuboard5/releases/tag/5.3.2.0
Release NotesThird Party Advisory