The pcs daemon (pcsd) in PCS 0.9.137 and earlier does not include the HTTPOnly flag in a Set-Cookie header, which makes it easier for remote attackers to obtain potentially sensitive information via script access to this cookie. NOTE: this issue was SPLIT from CVE-2015-1848 per ADT2 due to different vulnerability types.
Conclusion & alert: CVE-2015-3983 is rated Moderate Risk (40.5/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 0.61%). Mandatory action: Review affected assets and schedule remediation.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2025-03-30 | 0.84% | 0.61% | -0.23% |
| 2 | 2025-03-29 | 0.61% | 0.84% | +0.23% |
| 3 | 2025-03-17 | — | 0.61% | — |
Full EPSS history (5 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 4.3 | 2.0 | MEDIUM |
|
8.6 | 2.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
unimportant | CVE-2015-3983 unimportant priority: Debian including 1 source packages (pcs), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2015-3983 |
redhat
|
high | — | https://access.redhat.com/security/cve/CVE-2015-3983 |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| fedora | pacemaker_configuration_system | <= 0.9.137 | cpe:2.3:a:fedora:pacemaker_configuration_system:*:*:*:*:*:*:*:* |