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CVE-2018-1000154

21
FAUCET Score

CVE-2018-1000154 describes a cross-site scripting (XSS) vulnerability in Zammad versions 2.3.0 and earlier. This flaw allows an attacker to embed and execute JavaScript code in a user's browser by crafting malicious email subjects that are not properly sanitized. The vulnerability has a CVSSv3 score of 6.1 (Medium), indicating a low attack complexity and requiring user interaction (opening a ticket) for successful exploitation, potentially leading to limited confidentiality and integrity impacts. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE. The vulnerability was addressed in Zammad versions 2.3.1, 2.2.2, and 2.1.3.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2.3.0CPE matchmatch criteria
cpe:2.3:a:zammad:zammad:*:*:*:*:*:*:*:*

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
1.60%
Probability of exploitation in next 30 days
EPSS Percentile
73.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0160 is in the 85th 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

Remediation records are not available for this CVE.

References

github.com / zammad/zammad/issues/1869
Third Party Advisory
zammad.com / news/release-2-4
Vendor Advisory
zammad.com / news/security-advisory-zaa-2018-01
Vendor Advisory