PatchTheCVECVE-2013-3635: ProjectPier 0.8.8 has stored XSS
36
Routine
MEDIUM 5.4DOWNGRADE
CVE-2013-3635 is a medium-severity flaw (CVSS 5.4) affecting projectpier. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
ProjectPier 0.8.8 has stored XSS
Why this priority
- Public exploit reference
No fix is published yet: follow the downgrade or mitigation steps.
Risk facts
| CVSS score | 5.4 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | Low |
| User interaction | Required |
| EPSS exploit chance | 0.6% (top 52%) |
| CISA exploited list | No |
| Weakness | CWE-79 |
| Published | 2020-02-07 |
| Last modified | 2026-06-16 |
Publisher (CNA): MITRE · Vendor: projectpier
Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
projectpier projectpier DOWNGRADE
Affected: 0.8.8
Fixed in: no fixed release known
Safe to downgrade to: a release before 0.8.8
1. Check installed version
apt-cache policy projectpier || rpm -q projectpier || projectpier --version
2. No fixed release: DOWNGRADE to a release before 0.8.8 (Debian / Ubuntu)
apt-cache madison projectpier
sudo apt install projectpier=<VERSION_BEFORE_0.8.8>
sudo apt-mark hold projectpier
2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list projectpier
sudo dnf downgrade projectpier-<VERSION_BEFORE_0.8.8>
sudo dnf versionlock add projectpier
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.
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.
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-2013-3635?
projectpier: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.
Is CVE-2013-3635 being exploited?
CVE-2013-3635 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-2013-3635 affect?
CVE-2013-3635 affects projectpier. Severity is medium (CVSS 5.4). ProjectPier 0.8.8 has stored XSS
How urgent is CVE-2013-3635?
Priority 36/100. Public exploit reference
Related CVEs
- CVE-2013-3637 MEDIUM 5.4 DOWNGRADE ProjectPier 0.8.8 does not use the Secure flag for cookies
- CVE-2013-3636 MEDIUM 5.4 DOWNGRADE ProjectPier 0.8.8 has a Remote Information Disclosure Weakness because of the lack of the HttpOnly cookie flag