How severe is CVE-2022-22577?

CVE-2022-22577 has a CVSS score of 6.1/10, rated MEDIUM. Review your exposure and patch according to your risk tolerance.

Which packages are affected by CVE-2022-22577?

CVE-2022-22577 affects the following packages: actionpack (RubyGems), actionpack (RubyGems), actionpack (RubyGems), actionpack (RubyGems). Ecosystems affected: RubyGems.

How do I fix CVE-2022-22577?

Update actionpack to 5.2.7.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2022-22577 is resolved across your whole dependency graph.

How do I detect CVE-2022-22577 in my RubyGems dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for actionpack, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate CVE-2022-22577 if there is no patch (or I can't update yet)?

Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.

Is CVE-2022-22577 actively exploited in the wild?

No public exploit code has been indexed for CVE-2022-22577 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-2022-22577?

CVE-2022-22577 has an EPSS (Exploit Prediction Scoring System) score of 1.8%, placing it in the 78th 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-2022-22577?

CVE-2022-22577 is classified as Cross-site Scripting (XSS) (CWE-79). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation. This is a high-impact weakness class that often enables remote code execution or data exposure.

When was CVE-2022-22577 published, and has it been updated?

CVE-2022-22577 was published on May 26, 2022 and was last updated on March 14, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

💎

💎 RubyGems

Not in CISA KEV

MEDIUM severity

CVE-2022-22577 — actionpack

MEDIUMFix: rails/rails#44635

CVE-2022-22577 is a medium-severity (CVSS 6.1) Cross-site Scripting (XSS) vulnerability in actionpack. A fix is available for actionpack — see the affected versions and patch details below.

Cross-site Scripting Vulnerability in Action Pack

Also known asGHSA-mm33-5vfq-3mm3

Published

May 26, 2022

Updated

Mar 14, 2026

Affected

4 pkgs

Patched

4 / 4

Exploits

None indexed

Exploitation data as of Nov 4, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗

1.8%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs78th percentile — riskier than 78% of all scored CVEsHighest risk

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

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

4 pkgs affected

💎actionpack💎actionpack💎actionpack💎actionpack

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

Description

There is a possible XSS vulnerability in Rails / Action Pack. This vulnerability has been assigned the CVE identifier CVE-2022-22577.

Versions Affected: >= 5.2.0 Not affected: < 5.2.0 Fixed Versions: 7.0.2.4, 6.1.5.1, 6.0.4.8, 5.2.7.1

Impact

CSP headers were only sent along with responses that Rails considered as "HTML" responses. This left API requests without CSP headers, which could possibly expose users to XSS attacks.

Releases

The FIXED releases are available at the normal locations.

Workarounds

Set a CSP for your API responses manually.

Affected Packages

4 total 4 fixed

Ecosystem	Package	Vulnerable range	Fix
💎RubyGems	`actionpack`	≥ 5.2.0&&< 5.2.7.1	5.2.7.1`bundle update actionpack --conservative`
💎RubyGems	`actionpack`	≥ 6.0.0&&< 6.0.4.8	6.0.4.8`bundle update actionpack --conservative`
💎RubyGems	`actionpack`	≥ 6.1.0&&< 6.1.5.1	6.1.5.1`bundle update actionpack --conservative`
💎RubyGems	`actionpack`	≥ 7.0.0&&< 7.0.2.4	7.0.2.4`bundle update actionpack --conservative`

Affected Products

2 products · 5 configurations

debian linuxdebian

1 version

10.0

Application

actionpackrubyonrails

≥ 7.0.0 && < 7.0.2.4

range

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for actionpack, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update actionpack to 5.2.7.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2022-22577 is resolved across your whole dependency graph.
Workarounds
Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.

Fixing This On Your OS

If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.

Red HatModerate

Product	Fixed in	Advisory
Red Hat Satellite 6.13 for RHEL 8	`tfm-rubygem-actionpack-0:6.1.7-1.el8sat`	RHSA-2023:2097

Frequently Asked Questions

There is a possible XSS vulnerability in Rails / Action Pack. This vulnerability has been assigned the CVE identifier CVE-2022-22577. Versions Affected: >= 5.2.0 Not affected: < 5.2.0 Fixed Versions: 7.0.2.4, 6.1.5.1, 6.0.4.8, 5.2.7.1 ## Impact CSP headers were only sent along with responses that Rails considered as "HTML" responses. This left API requests without CSP headers, which could possibly expose users to XSS attacks. ## Releases The FIXED releases are available at the normal locations. ## Workarounds Set a CSP for your API responses manually.

O3 Security · Impact-Aware SCA

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