CVE-2020-28500: Regular Expression Denial of Service (ReDoS)
Vulnerability summary
CVE-2020-28500 is a medium (CVSS 5.3) vulnerability in lodash. EPSS estimates a 7.34% chance of exploitation in the next 30 days, higher than 94.4% of scored vulnerabilities. 6 public exploits are recorded.
Not severe (CVSS 5.3, network access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 3 · Related 1Timeline
- 15-02-2021PublishedVulnerability first disclosed.
- 08-10-2026Last modifiedVulnerability information updated.
Description
Lodash versions prior to 4.17.21 are vulnerable to Regular Expression Denial of Service (ReDoS) via the toNumber, trim and trimEnd functions.
CVSS metrics
7 scores · 6 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated5.3MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- OSV · DebianEcosystem advisory · calculated5.3MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- OSV · NpmEcosystem advisory · calculated5.3MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- OSV · RubygemsEcosystem advisory · calculated5.3MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- NVDNIST5.3MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
EPSS trend
Probability
7.34%
Chance of exploitation in the next 30 days
Percentile
94%
Versus all other CVEs
30-day change
No change 0.00 pp
From 7.34% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
6 foundExploit Reference (snyk.io)
Maturity: unknown
Exploit Reference (snyk.io)
Maturity: unknown
Exploit Reference (snyk.io)
Maturity: unknown
Weaknesses
CWE · root causeNo weakness data has been published for this record.
Affected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Oracle17 products
- banking_corporate_lending_process_management14.2.0 | 14.3.0 | 14.5.0
- banking_credit_facilities_process_management14.2.0 | 14.3.0 | 14.5.0
- banking_extensibility_workbench14.2.0 | 14.3.0 | 14.5.0
- banking_supply_chain_finance14.2.0 | 14.3.0 | 14.5.0
- banking_trade_finance_process_management14.2.0 | 14.3.0 | 14.5.0
Npm4 products
- lodash≥ 4.0.0, < 4.17.21
- lodash-es≥ 4.0.0, < 4.17.21
- lodash.trim≥ 4.0.0, ≤ 4.5.1
- lodash.trimend≥ 4.0.0, ≤ 4.5.1
Debian1 product
- node-lodash< 4.17.21+dfsg+~cs8.31.173-1
Lodash1 product
- lodash< 4.17.21
RubyGems1 product
- lodash-rails≥ 4.0.0, < 4.17.21
Siemens1 product
- sinec_ins< 1.0 | 1.0 | 1.0:sp1
Ubuntu1 product
- node-lodash< 4.17.4+dfsg-1ubuntu0.1~esm1 | < 4.17.15+dfsg-2ubuntu0.1~esm1
7 vendors · 26 products
References
26 links- snyk.io/vuln/SNYK-JAVA-ORGWEBJARSBOWERGITHUBLODASH-1074895X Refsource MISCREPORTWEBExploitThird Party Advisory
- www.oracle.com//security-alerts/cpujul2021.htmlX Refsource MISCWEBNot ApplicableThird Party Advisory
Show all 26 references
- cert-portal.siemens.com/productcert/pdf/ssa-637483.pdfX Refsource CONFIRMWEBPatchThird Party Advisory
- github.com/lodash/lodashPACKAGE