CVE-2017-18016: Parity Browser 1.6.10 and earlier allows remote attackers to bypass the Same Origin Policy and obtain sensitiv

Q: How do I fix CVE-2017-18016?

browser: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Q: Is CVE-2017-18016 being exploited?

CVE-2017-18016 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2017-18016 affect?

CVE-2017-18016 affects browser. Severity is medium (CVSS 5.3). Parity Browser 1.6.10 and earlier allows remote attackers to bypass the Same Origin Policy and obtain sensitive information by requesting other websites via the Parity web proxy engine (reusing the current website's token, which is not boun

Q: How urgent is CVE-2017-18016?

Priority 52/100. EPSS top 7%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action

This week

MEDIUM 5.3REMOTEDOWNGRADE

CVE-2017-18016 is a medium-severity flaw (CVSS 5.3) affecting browser. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Parity Browser 1.6.10 and earlier allows remote attackers to bypass the Same Origin Policy and obtain sensitive information by requesting other websites via the Parity web proxy engine (reusing the current website's token, which is not bound to an origin).

Why this priority

EPSS top 7%: very likely to be exploited
Public exploit reference
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	5.5% (top 7%)
CISA exploited list	No
Weakness	CWE-346
Published	2018-01-11
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: parity

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

Am I affected?

Timeline

2018-01-11 16:29 UTCPublished CVE record published
2026-06-17 01:12 UTCUpdated Record last modified

parity browser DOWNGRADE

Affected: 1.6.10

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.6.10

1. Check installed version

apt-cache policy browser || rpm -q browser || browser --version

2. No fixed release: DOWNGRADE to a release before 1.6.10 (Debian / Ubuntu)

apt-cache madison browser sudo apt install browser=<VERSION_BEFORE_1.6.10> sudo apt-mark hold browser

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list browser sudo dnf downgrade browser-<VERSION_BEFORE_1.6.10> sudo dnf versionlock add browser

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.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: Parity Browser < 1.6.10 - Bypass Same Origin Policy

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-2017-18016?

browser: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2017-18016 being exploited?

CVE-2017-18016 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-2017-18016 affect?

CVE-2017-18016 affects browser. Severity is medium (CVSS 5.3). Parity Browser 1.6.10 and earlier allows remote attackers to bypass the Same Origin Policy and obtain sensitive information by requesting other websites via the Parity web proxy engine (reusing the current website's token, which is not boun

How urgent is CVE-2017-18016?

Priority 52/100. EPSS top 7%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2025-6152 MEDIUM 6.3 DOWNGRADE A vulnerability, which was classified as critical, was found in Steel Browser up to 0.1.3
CVE-2023-52263 MEDIUM 6.1 UPGRADE Brave Browser before 1.59.40 does not properly restrict the schema for WebUI factory and redirect
CVE-2023-28364 MEDIUM 6.1 UPGRADE An Open Redirect vulnerability exists prior to version 1.52.117, where the built-in QR scanner in Brave Browse
CVE-2021-22917 MEDIUM 6.5 UPGRADE Brave Browser Desktop between versions 1.17 and 1.20 is vulnerable to information disclosure by way of DNS req
CVE-2017-1000461 MEDIUM 4.7 UPGRADE Brave Software's Brave Browser, version 0.19.73 (and earlier) is vulnerable to an incorrect access control iss

References

← Back to latest CVEs