CVE-2020-1768 [Medium] | Security Vulnerability in Otrs

The external frontend system uses numerous background calls to the backend. Each background request is treated as user activity so the SessionMaxIdleTime will not be reached. This issue affects: OTRS 7.0.x version 7.0.14 and prior versions.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-06-15	0.31%	0.75%	+0.43%
2	2025-11-21	0.23%	0.31%	+0.09%
3	2025-11-18	—	0.23%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-06-15

0.31%

0.75%

+0.43%

2025-11-21

0.23%

0.31%

+0.09%

2025-11-18

—

0.23%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
5.4	3.1	MEDIUM	`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L` 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:L) A normal user session is enough; they don’t have to be admin. 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:N) Data isn’t meaningfully altered or forged. Availability (A:L) Might cause slowdowns, glitches, or partial disruption—not a full brick.	2.8	2.5	[email protected]
5.4	3.1	MEDIUM	`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L` 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:L) A normal user session is enough; they don’t have to be admin. 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:N) Data isn’t meaningfully altered or forged. Availability (A:L) Might cause slowdowns, glitches, or partial disruption—not a full brick.	2.8	2.5	[email protected]
5.5	2.0	MEDIUM	`AV:N/AC:L/Au:S/C:P/I:N/A:P` 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:S) A single authentication is required. Confidentiality impact (C:P) Partial confidentiality impact. Integrity impact (I:N) No integrity impact. Availability impact (A:P) Partial availability impact.	8.0	4.9	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

5.4

3.1

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L 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:L): A normal user session is enough; they don’t have to be admin.
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:N): Data isn’t meaningfully altered or forged.
Availability (A:L): Might cause slowdowns, glitches, or partial disruption—not a full brick.

2.8

2.5

[email protected]

5.4

3.1

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L 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:L): A normal user session is enough; they don’t have to be admin.
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:N): Data isn’t meaningfully altered or forged.
Availability (A:L): Might cause slowdowns, glitches, or partial disruption—not a full brick.

2.8

2.5

[email protected]

5.5

2.0

MEDIUM

AV:N/AC:L/Au:S/C:P/I:N/A:P 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:S): A single authentication is required.
Confidentiality impact (C:P): Partial confidentiality impact.
Integrity impact (I:N): No integrity impact.
Availability impact (A:P): Partial availability impact.

8.0

4.9

[email protected]

OS Trackers for CVE-2020-1768

vendor	priority	summary	link
`debian`	unimportant	CVE-2020-1768 unimportant priority: Debian including 1 source packages (otrs2), 1 status rows across 1 suites (bullseye): resolved 1.	https://security-tracker.debian.org/tracker/CVE-2020-1768
`ubuntu`	low	CVE-2020-1768 low priority: Ubuntu including 1 source packages (otrs2), 17 status rows across 17 suites (bionic, eoan, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): DNE 8, ignored 4, needs-triage 4, not-affected 1.	https://ubuntu.com/security/CVE-2020-1768

Affected software / configurations for CVE-2020-1768

Vendor	Product	Version	Raw CPE
otrs	otrs	>= 7.0.0, <= 7.0.14	cpe:2.3:a:otrs:otrs::::::::

References for CVE-2020-1768

URL	Tags
https://otrs.com/release-notes/otrs-security-advisory-2020-04/	Vendor Advisory

URL

CVE-2020-1768 | External Interface does not invalidate session

Exploit prediction scoring system (EPSS) score for CVE-2020-1768

Common vulnerability scoring system (CVSS) metrics for CVE-2020-1768

Weakness enumeration for CVE-2020-1768

OS Trackers for CVE-2020-1768

Affected software / configurations for CVE-2020-1768

References for CVE-2020-1768