CVE-2020-15169: In Action View before versions 5.2.4.4 and 6.0.3.3 there is a potential Cross-Site Scripting (XSS) vulnerabili

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MEDIUM 5.4REMOTEWATCHLISTUPGRADEMITIGATEMITIGATE

CVE-2020-15169 is a medium-severity flaw (CVSS 5.4) affecting action view, debian linux, fedora. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In Action View before versions 5.2.4.4 and 6.0.3.3 there is a potential Cross-Site Scripting (XSS) vulnerability in Action View's translation helpers. Views that allow the user to control the default (not found) value of the `t` and `translate` helpers could be susceptible to XSS attacks. When an HTML-unsafe string is passed as the default for a missing translation key named html or ending in _html, the default string is incorrectly marked as HTM

Why this priority

Remotely exploitable, no login, no user action
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	5.4 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	2.4% (top 16%)
CISA exploited list	No
Weakness	CWE-79
Published	2020-09-11
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: action view project · debian · fedoraproject

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2020-09-11 16:15 UTCPublished CVE record published
2026-06-17 02:56 UTCUpdated Record last modified

action view project action view UPGRADE

Affected: < 5.2.4.4 · >= 6.0.0.0 and < 6.0.3.3

Fixed in: 5.2.4.4, 6.0.3.3

Safe to downgrade to: a release before 6.0.0.0

1. Check installed version

apt-cache policy action-view || rpm -q action-view || action-view --version

2. UPGRADE to 5.2.4.4 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade action-view

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade action-view

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 6.0.0.0 (Debian / Ubuntu)

apt-cache madison action-view sudo apt install action-view=<VERSION_BEFORE_6.0.0.0> sudo apt-mark hold action-view

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list action-view sudo dnf downgrade action-view-<VERSION_BEFORE_6.0.0.0> sudo dnf versionlock add action-view

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

debian debian linux MITIGATE

Affected: 10.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 10.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

fedoraproject fedora MITIGATE

Affected: 33

Fixed in: no fixed release known

Safe to downgrade to: a release before 33

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2020-15169?

action view: upgrade to 5.2.4.4, 6.0.3.3; debian linux: mitigate or apply the listed mitigation; fedora: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2020-15169 being exploited?

CVE-2020-15169 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2020-15169 affect?

CVE-2020-15169 affects action view, debian linux, fedora. Severity is medium (CVSS 5.4). In Action View before versions 5.2.4.4 and 6.0.3.3 there is a potential Cross-Site Scripting (XSS) vulnerability in Action View's translation helpers. Views that allow the user to control the default (not found) value of the `t` and `transl

How urgent is CVE-2020-15169?

Priority 50/100. Remotely exploitable, no login, no user action; On your watchlist

Software pages

Debian vulnerabilities

References

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