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CVE-2013-5663

15
FAUCET Score

CVE-2013-5663 describes a security bypass vulnerability in Palo Alto Networks PAN-OS versions prior to 4.0.14, 4.1.11, and 5.0.2. This flaw allows remote attackers to circumvent security policies due to invalid App-ID caching, potentially misidentifying HTTP traffic as SIP traffic. The vulnerability has a CVSS score of 4.3 (medium severity), indicating a network-based attack with medium complexity, requiring no authentication, and primarily impacting integrity. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 4.0.8CPE matchmatch criteria
cpe:2.3:o:paloaltonetworks:pan-os:*:*:*:*:*:*:*:*
4.0.0CPE matchmatch criteria
cpe:2.3:o:paloaltonetworks:pan-os:4.0.0:*:*:*:*:*:*:*
4.0.1CPE matchmatch criteria
cpe:2.3:o:paloaltonetworks:pan-os:4.0.1:*:*:*:*:*:*:*
4.0.2CPE matchmatch criteria
cpe:2.3:o:paloaltonetworks:pan-os:4.0.2:*:*:*:*:*:*:*
4.0.3CPE matchmatch criteria
cpe:2.3:o:paloaltonetworks:pan-os:4.0.3:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

4.3MEDIUM

AV:N/AC:M/Au:N/C:N/I:P/A:N

Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
2.82%
Probability of exploitation in next 30 days
EPSS Percentile
85.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0282 is in the 77th percentile among its peer group of 19,958 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 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

cansecwest.com / csw11/Network%20Application%20FW%20vs.%20Contemporary%20Threats%20%28Brad%20Woodberg%20-%20Final%29.pptx
pastie.org / pastes/5568186/text
Exploit
researchcenter.paloaltonetworks.com / 2013/01/app-id-cache-pollution-update
security.paloaltonetworks.com / CVE-2013-5663