CVE-2021-0296 | CTPView: HSTS not being enforced on CTPView server.

The Juniper Networks CTPView server is not enforcing HTTP Strict Transport Security (HSTS). HSTS is an optional response header which allows servers to indicate that content from the requested domain will only be served over HTTPS. The lack of HSTS may leave the system vulnerable to downgrade attacks, SSL-stripping man-in-the-middle attacks, and weakens cookie-hijacking protections. This issue affects Juniper Networks CTPView: 7.3 versions prior to 7.3R7; 9.1 versions prior to 9.1R3.

Published: 2021-10-19 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-0296 is rated Moderate Risk (43.2/100): CVSS High severity, with low exploitation likelihood (EPSS 0.49%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2021-0296

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 2026-06-15 0.13% 0.49% +0.36%
2 2023-03-07 0.89% 0.13% -0.75%
3 2022-04-01 — 0.89% —

Full EPSS history (6 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-0296

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.4 3.1 HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:N)
Service keeps running; no real outage angle.
 2.2 5.2 [email protected]
5.8 2.0 MEDIUM
AV:N/AC:M/Au:N/C:P/I:P/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:N)
No availability impact.
 8.6 4.9 [email protected]

Weakness enumeration for CVE-2021-0296

Affected software / configurations for CVE-2021-0296

Vendor Product Version Raw CPE
juniper ctpview 7.3 cpe:2.3:a:juniper:ctpview:7.3:r1:*:*:*:*:*:*
juniper ctpview 7.3 cpe:2.3:a:juniper:ctpview:7.3:r2:*:*:*:*:*:*
juniper ctpview 7.3 cpe:2.3:a:juniper:ctpview:7.3:r3:*:*:*:*:*:*
juniper ctpview 7.3 cpe:2.3:a:juniper:ctpview:7.3:r4:*:*:*:*:*:*
juniper ctpview 7.3 cpe:2.3:a:juniper:ctpview:7.3:r5:*:*:*:*:*:*
juniper ctpview 7.3 cpe:2.3:a:juniper:ctpview:7.3:r6:*:*:*:*:*:*
juniper ctpview 9.1 cpe:2.3:a:juniper:ctpview:9.1:r1:*:*:*:*:*:*
juniper ctpview 9.1 cpe:2.3:a:juniper:ctpview:9.1:r2:*:*:*:*:*:*

References for CVE-2021-0296

URL Tags
https://kb.juniper.net/JSA11210 Vendor Advisory
cvelogic Threat Intelligence