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CVE-2018-1539

21
FAUCET Score

CVE-2018-1539 describes an authentication bypass vulnerability affecting IBM Rational Engineering Lifecycle Manager versions 5.0 through 5.0.2 and 6.0 through 6.0.6. This medium-severity flaw (CVSS 6.5) allows remote, unauthenticated attackers to gain unauthorized access by directly requesting or forcing browsing to unintended URLs, potentially leading to information disclosure and data modification. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
>= 5.0.0, <= 5.0.2CPE matchmatch criteria
cpe:2.3:a:ibm:rational_engineering_lifecycle_manager:*:*:*:*:*:*:*:*
>= 6.0.0, <= 6.0.6CPE matchmatch criteria
cpe:2.3:a:ibm:rational_engineering_lifecycle_manager:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.4MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.3
Impact Score
2.7
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.30%
Probability of exploitation in next 30 days
EPSS Percentile
67.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0130 is in the 47th percentile among its peer group of 23,725 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

Remediation records are not available for this CVE.

References

exchange.xforce.ibmcloud.com / vulnerabilities/142561
VDB EntryVendor Advisory
ibm.com / support/docview.wss
Vendor Advisory