CVE-2020-7760 | Regular Expression Denial of Service (ReDoS)

Exp

This affects the package codemirror before 5.58.2; the package org.apache.marmotta.webjars:codemirror before 5.58.2. The vulnerable regular expression is located in https://github.com/codemirror/CodeMirror/blob/cdb228ac736369c685865b122b736cd0d397836c/mode/javascript/javascript.jsL129. The ReDOS vulnerability of the regex is mainly due to the sub-pattern (s|/*.*?*/)*

Published: 2020-10-30 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2020-7760 is rated Exploit Available (54.9/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 0.34%). 7 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

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

Public exploit references (Exploit-DB) for CVE-2020-7760

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2020-7760

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 2025-11-21 1.23% 0.34% -0.89%
2 2025-11-18 0.34% 1.23% +0.89%
3 2025-03-30 — 0.34% —

Full EPSS history (18 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2020-7760

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.3 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/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: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:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:L)
Might cause slowdowns, glitches, or partial disruption—not a full brick.
 3.9 1.4 [email protected]
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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: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:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 [email protected]
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/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:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2020-7760

GitHub Security Advisory for CVE-2020-7760

GHSA-4gw3-8f77-f72c · Severity: medium · Ecosystem: npm — Regular expression denial of service in codemirror

OS Trackers for CVE-2020-7760

vendor priority summary link
debian not yet assigned CVE-2020-7760 not yet assigned priority: Debian including 1 source packages (codemirror-js), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2020-7760
redhat medium — https://access.redhat.com/security/cve/CVE-2020-7760
ubuntu medium CVE-2020-7760 medium priority: Ubuntu including 1 source packages (codemirror-js), 16 status rows across 16 suites (bionic, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): not-affected 10, needs-triage 4, DNE 1, ignored 1. https://ubuntu.com/security/CVE-2020-7760

Affected software / configurations for CVE-2020-7760

Vendor Product Version Raw CPE
codemirror codemirror < 5.58.2 cpe:2.3:a:codemirror:codemirror:*:*:*:*:*:*:*:*
oracle application_express < 20.2 cpe:2.3:a:oracle:application_express:*:*:*:*:*:*:*:*
oracle enterprise_manager_express_user_interface 19c cpe:2.3:a:oracle:enterprise_manager_express_user_interface:19c:*:*:*:*:*:*:*
oracle essbase 21.2 cpe:2.3:a:oracle:essbase:21.2:*:*:*:*:*:*:*
oracle hyperion_data_relationship_management < 11.2.9.0 cpe:2.3:a:oracle:hyperion_data_relationship_management:*:*:*:*:*:*:*:*
oracle spatial_studio < 19.1.0 cpe:2.3:a:oracle:spatial_studio:*:*:*:*:*:*:*:*

References for CVE-2020-7760

URL Tags
https://github.com/codemirror/CodeMirror/commit/55d0333907117c9231ffdf555ae8824705993bbb Patch Third Party Advisory
https://snyk.io/vuln/SNYK-JAVA-ORGAPACHEMARMOTTAWEBJARS-1024450 Exploit Third Party Advisory
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARS-1024449 Exploit Third Party Advisory
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSBOWER-1024445 Exploit Third Party Advisory
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSBOWERGITHUBCODEMIRROR-1024448 Exploit Third Party Advisory
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSBOWERGITHUBCOMPONENTS-1024446 Exploit Third Party Advisory
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1024447 Exploit Third Party Advisory
https://snyk.io/vuln/SNYK-JS-CODEMIRROR-1016937 Exploit Third Party Advisory
https://www.debian.org/security/2020/dsa-4789 Third Party Advisory
https://www.oracle.com//security-alerts/cpujul2021.html Patch Third Party Advisory
https://www.oracle.com/security-alerts/cpuApr2021.html Patch Third Party Advisory
https://www.oracle.com/security-alerts/cpuapr2022.html Patch Third Party Advisory
cvelogic Threat Intelligence