How severe is CVE-2020-7780?

CVE-2020-7780 has a CVSS score of 8.8/10, rated HIGH. Immediate patching is strongly recommended.

Which packages are affected by CVE-2020-7780?

CVE-2020-7780 affects the following packages: com.softwaremill.akka-http-session:core_2.13 (Maven), com.softwaremill.akka-http-session:core_2.12 (Maven), com.softwaremill.akka-http-session:core_2.11 (Maven). Ecosystems affected: Maven.

How do I fix CVE-2020-7780?

Update com.softwaremill.akka-http-session:core_2.13 to 0.5.11 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2020-7780 is resolved across your whole dependency graph.

How do I detect CVE-2020-7780 in my Maven dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for com.softwaremill.akka-http-session:core_2.13, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate CVE-2020-7780 if there is no patch (or I can't update yet)?

If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Is CVE-2020-7780 actively exploited in the wild?

No public exploit code has been indexed for CVE-2020-7780 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2020-7780?

CVE-2020-7780 has an EPSS (Exploit Prediction Scoring System) score of 0.7%, placing it in the 50th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is CVE-2020-7780?

CVE-2020-7780 is classified as Cross-Site Request Forgery (CSRF) (CWE-352). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

When was CVE-2020-7780 published, and has it been updated?

CVE-2020-7780 was published on November 27, 2020 and was last updated on July 8, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

☕

☕ Maven

Not in CISA KEV

HIGH severity

CVE-2020-7780 — core_2.13

HIGHFix: softwaremill/akka-http-session@57f1166

CVE-2020-7780 is a high-severity (CVSS 8.8) Cross-Site Request Forgery (CSRF) vulnerability in com.softwaremill.akka-http-session:core_2.13. A fix is available for com.softwaremill.akka-http-session:core_2.13 — see the affected versions and patch details below.

Cross-Site Request Forgery

Also known asGHSA-q42q-523g-3fwv

Published

Nov 27, 2020

Updated

Jul 8, 2026

Affected

3 pkgs

Patched

3 / 3

Exploits

None indexed

Exploitation data as of Oct 11, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗

0.7%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs50th percentile — riskier than 50% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

CVE-2020-7780 by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.

Where this sits among everything scored

Of 385,987 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.

Real-World Exposure

3 pkgs affected

☕com.softwaremill.akka-http-session:core_2.13☕com.softwaremill.akka-http-session:core_2.12☕com.softwaremill.akka-http-session:core_2.11

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.

Description

This affects the package com.softwaremill.akka-http-session:core_2.13 before 0.5.11; the package com.softwaremill.akka-http-session:core_2.12 before 0.5.11; the package com.softwaremill.akka-http-session:core_2.11 before 0.5.11. For older versions, endpoints protected by randomTokenCsrfProtection could be bypassed with an empty X-XSRF-TOKEN header and an empty XSRF-TOKEN cookie.

Affected Packages

3 total 3 fixed

Ecosystem	Package	Vulnerable range	Fix
☕Maven	`com.softwaremill.akka-http-session:core_2.13`	all versions	0.5.11`com.softwaremill.akka-http-session:core_2.13:0.5.11`
☕Maven	`com.softwaremill.akka-http-session:core_2.12`	all versions	0.5.11`com.softwaremill.akka-http-session:core_2.12:0.5.11`
☕Maven	`com.softwaremill.akka-http-session:core_2.11`	all versions	0.5.11`com.softwaremill.akka-http-session:core_2.11:0.5.11`

Affected Products

1 product · 1 configurations

Application

akka-http-sessionsoftwaremill

≤ 0.5.11

range

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for com.softwaremill.akka-http-session:core_2.13, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update com.softwaremill.akka-http-session:core_2.13 to 0.5.11 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2020-7780 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

O3 Security · Impact-Aware SCA

Is CVE-2020-7780 in your dependencies?

Find it across Maven, including transitive dependencies.

Scan my dependencies How O3 SCA works

CVSS Score

8.8/10CVSS v3 base

Vector breakdown

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Raw vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CWE Classification

CWE-352Cross-Site Request Forgery (CSRF)

Weaponization

No known public exploit tooling found.

OpenSSF Scorecard

Package health score

akka-http-session

3.1/10

Code-Review3/10

Maintained0/10

Branch-Protection0/10

Assessed Oct 5, 2026

Timeline

Disclosed

Nov 27, 2020

Last updated

Jul 8, 2026

Identifiers

CVE-2020-7780

GHSA-q42q-523g-3fwv

References

Advisorygithub.com Advisorygithub.com Advisorynvd.nist.gov Fixgithub.com Fixsnyk.io Fixsnyk.io Fixsnyk.io

Related vulnerabilities

Also affects core_2.12

This CVE is high severity, in line with the other 1 CVE affecting core_2.12.

CVE-2020-28452

Same weakness: CWE-352

This CVE is high severity; 5 of 7 other CVEs with CWE-352 are rated as high or higher (top: high).

CVE-2026-61593CVE-2026-59148CVE-2026-73222CVE-2026-73292CVE-2026-81890CVE-2026-19418CVE-2026-81888Browse all CWE-352

Provenance

Sources

OSV.devNVDFIRST.org (EPSS)

Last verifiedJul 8, 2026

CVE-2020-7780 — core_2.13

EPSS Exploitation Probability

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

Description

Affected Packages

Affected Products

Detection & mitigation playbook

Detect

Fix

Workarounds

Frequently Asked Questions

Is CVE-2020-7780 in your dependencies?