CVE-2017-13803 [High] | Memory Corruption in Safari

An issue was discovered in certain Apple products. iOS before 11.1 is affected. Safari before 11.0.1 is affected. iCloud before 7.1 on Windows is affected. iTunes before 12.7.1 on Windows is affected. tvOS before 11.1 is affected. The issue involves the "WebKit" component. It allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption and application crash) via a crafted web site.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-05-15	1.06%	0.57%	-0.49%
2	2025-08-31	1.32%	1.06%	-0.26%
3	2025-05-30	—	1.32%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-05-15

1.06%

0.57%

-0.49%

2025-08-31

1.32%

1.06%

-0.26%

2025-05-30

—

1.32%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
8.8	3.0	HIGH	`CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H` 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:L) Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup. Privileges required (PR:N) No account or special rights needed—anonymous or random user is enough. User interaction (UI:R) A real person has to do something—click, install, enable—otherwise it doesn’t land. 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:H) Could take the service down hard or make it unusable for people who depend on it.	2.8	5.9	[email protected]
6.8	2.0	MEDIUM	`AV:N/AC:M/Au:N/C:P/I:P/A:P` 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:P) Partial availability impact.	8.6	6.4	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

8.8

3.0

HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H 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:L): Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N): No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R): A real person has to do something—click, install, enable—otherwise it doesn’t land.
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:H): Could take the service down hard or make it unusable for people who depend on it.

2.8

5.9

[email protected]

6.8

2.0

MEDIUM

AV:N/AC:M/Au:N/C:P/I:P/A:P 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:P): Partial availability impact.

8.6

6.4

[email protected]

OS Trackers for CVE-2017-13803

vendor	priority	summary	link
`debian`	unimportant	CVE-2017-13803 unimportant priority: Debian including 1 source packages (webkit2gtk), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5.	https://security-tracker.debian.org/tracker/CVE-2017-13803
`gentoo`	normal	CVE-2017-13803: 1 GLSA(s) (201712-01), 1 atom(s) (net-libs/webkit-gtk); latest impact normal.	https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2017-13803
`ubuntu`	medium	CVE-2017-13803 medium priority: Ubuntu including 5 source packages (qtwebkit, qtwebkit-opensource-src, qtwebkit-source, webkit2gtk, webkitgtk), 87 status rows across 18 suites (artful, bionic, cosmic, disco, eoan, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, trusty, upstream, xenial, zesty): DNE 38, ignored 29, not-affected 13, released 4, needs-triage 3.	https://ubuntu.com/security/CVE-2017-13803

Affected software / configurations for CVE-2017-13803

Vendor	Product	Version	Raw CPE
apple	safari	< 11.0.1	cpe:2.3:a:apple:safari::::::::
apple	iphone_os	< 11.1	cpe:2.3:o:apple:iphone_os::::::::
apple	tvos	< 11.1	cpe:2.3:o:apple:tvos::::::::
apple	icloud	< 7.1	cpe:2.3:a:apple:icloud::::::::
apple	itunes	< 12.7.1	cpe:2.3:a:apple:itunes::::::::
apple	webkit	—	cpe:2.3:a:apple:webkit:-:::::::*

References for CVE-2017-13803

URL	Tags
http://www.securitytracker.com/id/1039703	Third Party Advisory VDB Entry
https://security.gentoo.org/glsa/201712-01	Third Party Advisory
https://support.apple.com/HT208219	Vendor Advisory
https://support.apple.com/HT208222	Vendor Advisory
https://support.apple.com/HT208223	Vendor Advisory
https://support.apple.com/HT208224	Vendor Advisory
https://support.apple.com/HT208225	Vendor Advisory

URL

CVE-2017-13803

Exploit prediction scoring system (EPSS) score for CVE-2017-13803

Common vulnerability scoring system (CVSS) metrics for CVE-2017-13803

Weakness enumeration for CVE-2017-13803

OS Trackers for CVE-2017-13803

Affected software / configurations for CVE-2017-13803

References for CVE-2017-13803