CVE-2018-0486 [Medium] | Information Disclosure in Xmltooling-C

Shibboleth XMLTooling-C before 1.6.3, as used in Shibboleth Service Provider before 2.6.0 on Windows and other products, mishandles digital signatures of user attribute data, which allows remote attackers to obtain sensitive information or conduct impersonation attacks via a crafted DTD.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-03-09	0.92%	0.78%	-0.14%
2	2025-11-21	0.76%	0.92%	+0.16%
3	2025-11-18	—	0.76%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-03-09

0.92%

0.78%

-0.14%

2025-11-21

0.76%

0.92%

+0.16%

2025-11-18

—

0.76%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
6.5	3.0	MEDIUM	`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/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: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: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:L) Some sensitive info could get out, but not a total data dump. Integrity (I:L) Attackers could change some data, but it’s limited—not everything goes. Availability (A:N) Service keeps running; no real outage angle.	3.9	2.5	[email protected]
6.4	2.0	MEDIUM	`AV:N/AC:L/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:L) Exploitation conditions are straightforward and predictable. 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.	10.0	4.9	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

6.5

3.0

MEDIUM

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/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: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: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:L): Some sensitive info could get out, but not a total data dump.
Integrity (I:L): Attackers could change some data, but it’s limited—not everything goes.
Availability (A:N): Service keeps running; no real outage angle.

3.9

2.5

[email protected]

6.4

2.0

MEDIUM

AV:N/AC:L/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:L): Exploitation conditions are straightforward and predictable.
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.

10.0

4.9

[email protected]

OS Trackers for CVE-2018-0486

vendor	priority	summary	link
`debian`	not yet assigned	CVE-2018-0486 not yet assigned priority: Debian including 1 source packages (xmltooling), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5.	https://security-tracker.debian.org/tracker/CVE-2018-0486
`redhat`	high	—	https://access.redhat.com/security/cve/CVE-2018-0486
`suse`	high	CVE-2018-0486 severity important: SUSE including 30 source package names (libxmltooling-devel, libxmltooling-devel-1.5.6-3.6.1, …), 88 product×package rows across 34 product lines (SUSE CaaS Platform 4.0, SUSE Enterprise Storage 6, … (34 product lines)): Fixed 50, Known Not Affected 38.	https://www.suse.com/security/cve/CVE-2018-0486/
`ubuntu`	medium	CVE-2018-0486 medium priority: Ubuntu including 1 source packages (xmltooling), 6 status rows across 6 suites (artful, bionic, trusty, upstream, xenial, zesty): released 3, ignored 2, not-affected 1.	https://ubuntu.com/security/CVE-2018-0486

Affected software / configurations for CVE-2018-0486

Vendor	Product	Version	Raw CPE
shibboleth	xmltooling-c	< 1.6.3	cpe:2.3:a:shibboleth:xmltooling-c::::::::
debian	debian_linux	7.0	cpe:2.3:o:debian:debian_linux:7.0:::::::*
debian	debian_linux	8.0	cpe:2.3:o:debian:debian_linux:8.0:::::::*
debian	debian_linux	9.0	cpe:2.3:o:debian:debian_linux:9.0:::::::*

References for CVE-2018-0486

URL	Tags
http://www.securitytracker.com/id/1040177	Third Party Advisory VDB Entry
https://lists.debian.org/debian-lts-announce/2018/01/msg00016.html	Mailing List Third Party Advisory
https://lists.debian.org/debian-security-announce/2018/msg00007.html	Mailing List Third Party Advisory
https://shibboleth.net/community/advisories/secadv_20180112.txt	Vendor Advisory
https://www.debian.org/security/2018/dsa-4085	Third Party Advisory

URL

CVE-2018-0486

Exploit prediction scoring system (EPSS) score for CVE-2018-0486

Common vulnerability scoring system (CVSS) metrics for CVE-2018-0486

Weakness enumeration for CVE-2018-0486

OS Trackers for CVE-2018-0486

Affected software / configurations for CVE-2018-0486

References for CVE-2018-0486